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Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
It is believed ___________ causes insomnia.
A. too much caffeine which
B. it is too much caffeine
C. that too much caffeine
D. too much caffeine that
It is believed ___________ causes insomnia.
A. too much caffeine which
B. it is too much caffeine
C. that too much caffeine
D. too much caffeine that
It is believed that ...
3 phương án A, B và D có lỗi sai về cấu trúc
3 phương án A, B và D có lỗi sai về cấu trúc
Đáp án C.