IMG-LOGO

Câu hỏi:

14/07/2024 1,127

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Do you remember ______ to help us when we were in difficulty?

A. to offer

B. once offering

Đáp án chính xác

C. you offer

D. being offered

Trả lời:

verified Giải bởi Vietjack

Đáp án B

Kiến thức: Remember + to Vo: nhớ việc cần làm nhưng chưa làm

Remember + Ving: nhớ việc đã xảy ra trong quá khứ

Tạm dịch: Bạn có nhớ đã từng đề nghị giúp đỡ chúng tôi khi chúng tôi khó khăn không?

Câu trả lời này có hữu ích không?

0

CÂU HỎI HOT CÙNG CHỦ ĐỀ

Câu 1:

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Due to ever more spreading poaching, there ______ a dramatic decline in the number of elephants over the last decade 

Xem đáp án » 18/06/2021 6,328

Câu 2:

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. He's sometimes bad-tempered but he's a good fellow ______.

Xem đáp án » 18/06/2021 3,800

Câu 3:

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Communities in remote areas are extremely _____ to famine if crops fail

Xem đáp án » 18/06/2021 2,992

Câu 4:

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

A large number of workmen ______ because of the economic recession

Xem đáp án » 18/06/2021 2,649

Câu 5:

Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges.

Thanh: “Lan’s the best singer in our school.” Nadia: “______”

Xem đáp án » 18/06/2021 2,328

Câu 6:

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
People don’t like the way he shows off, ______?

Xem đáp án » 18/06/2021 2,098

Câu 7:

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

As the old one, this new copier can perform  its functions  in half the time

Xem đáp án » 18/06/2021 1,689

Câu 8:

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

Thanks to the efforts of environmentalists, people are becoming better aware of the problems of endangered species

Xem đáp án » 18/06/2021 1,366

Câu 9:

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

He wasn't attending the lecture properly and missed most of ______.

Xem đáp án » 18/06/2021 996

Câu 10:

Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges.

Mai: “Do you want another serving of chicken soup?”

Scott: “______.”

Xem đáp án » 18/06/2021 905

Câu 11:

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

You can use my car ______ you drive carefully

Xem đáp án » 18/06/2021 862

Câu 12:

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

I could hear voices but I couldn’t ______ what they were saying

Xem đáp án » 18/06/2021 689

Câu 13:

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42

The ability to conduct electricity is one of the key properties of a metal. Other solid materials such as silicon can conduct electricity but only effectively at certain temperatures. Also, some substances such as salt (sodium chloride) can conduct when molten or when dissolved in water. The ability of metals to conduct electricity is due to how their atoms bond together. In order to bond together the metal atoms lose at least one of their outermost electrons. This leaves the metal atoms with a positive charge and they are now strictly ions. The lost electrons are free to move in what is known as a sea of electrons. Since the electrons are negatively charged they attract the ions and this is what keeps the structure together.

 An electric current is a flow of charge and since the electrons in the sea of electrons are free to move they can be made to flow in one direction when a source of electrical energy such as a battery is connected to the metal. Hence we have an electric current flowing through the wire, and this is what makes metals such good conductors of electricity. The only other common solid conducting material that pencil users are likely to encounter is graphite (what the „lead’ of a pencil is made from). Graphite is a form of carbon and again the carbon atoms bond in such a way that there is a sea of electrons that can be made to flow as an electric current. Likewise, if we have an ionic substance like salt we can make the electrically charged ions flow to create a current but only when those ions are free to move, either when the substance is a liquid or dissolved in water. In its solid state an ionic substance like salt cannot conduct electricity as its charged ions cannot flow.

 Electrical insulators are substances that cannot conduct electricity well either, because they contain no charged particles or any charged particles they might contain do not flow easily. Water itself is a poor conductor of electricity as it does not contain a significant amount of fully charged particles (the ends of a water molecule are partly charged but overall the molecule is neutral). However, most water we encounter does contain dissolved charged particles, so it will be more conductive than pure water. Many of the problems that occur when touching electrical devices with wet hands result from the ever-present salt that is left on our skin through perspiration and it dissolves in the water to make it more conductive.

By Helena Gillespie and Rob Gillespie. Science for Primary School Teachers. OUP

According to the passage, a metal can conduct electricity due to ______.

Xem đáp án » 18/06/2021 455

Câu 14:

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

These exercises look easy, but they are very relatively  difficult for us

Xem đáp án » 18/06/2021 444

Câu 15:

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

 “What ______ if the earth stopped moving?”

Xem đáp án » 18/06/2021 402

Câu hỏi mới nhất

Xem thêm »
Xem thêm »