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VIII: Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. Trả lời câu hỏi dưới đây:The effects of cigarette smoking ______to be extremely harmful so far.

VIII:
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer

Câu hỏi

Nhận biết

VIII:

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

Trả lời câu hỏi dưới đây:

The effects of cigarette smoking ______to be extremely harmful so far.


A.
 is proved 
B.
will be proved                      
C.
are proved
D.
have been proved
Đáp án đúng: D

Lời giải của Luyện Tập 365

Đáp án là D. So far: từ trước đến giờ, dấu hiệu nhận biết của thì hiện tại hoàn thành.

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