Đề thi học kì 1 Tiếng Anh 11 Global Success có đáp án (Đề 8)

This class,_____is a prerequisite for microbiology, is so difficult that I would rather drop it. A. that B. when C. where D. which

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This class,_____is a prerequisite for microbiology, is so difficult that I would rather drop it. 

that

when

where

which

Giải thích

Choose D