Thứ bảy, 21/09/2024
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Câu hỏi:

19/07/2024 45

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.

The effect of this drug has been proven to be extremely harmful a long time ago.

A. to be

B. has been 

Đáp án chính xác

C. harmful

D. this drug

Trả lời:

verified Giải bởi Vietjack

B

Kiến thức: Chia thì

Giải thích:

“a long time ago” → dấu hiệu nhận biết thì QKĐ

Sửa: has been → was

Dịch nghĩa: Tác dụng của loại thuốc này đã được chứng minh là vô cùng có hại từ rất lâu trước đây.

Câu trả lời này có hữu ích không?

0

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