By the end of the 21th century, scientists _________ the cure for the common cold.
Đáp án A
Thì tương lai hoàn thành dùng để diễn tả một hành động hay sự việc hoàn thành trước một thời điểm trong tương lai.
Dấu hiệu nhận biết: by + mốc thời gian trong tương lai
Dịch nghĩa: Vào cuối thế kỷ 21, các nhà khoa học sẽ tìm ra phương pháp chữa bệnh cảm thông thường.
The school was closed for a month because of serious ………… of fever.
It is stated in the passage that torches for lighting were made from ______.
The word “splendors” in the passage could be best replaced by which of the following?
At the time many rulers were afraid of science, and (130) ______connected with it was in danger.
The word “gloomy” in the passage is closest in meaning to ________.
People usually can get sufficient _________ of the calcium their bodies need from the food they consume.
According to the passage, which of the following sentence is NOT true?
The planes were delayed and the hotel was awful, but ______ we still had a good time.