—Why am I so slow at doing the cloze test?—I guess you didn’t realize the use the context

—Why am I so slow at doing the cloze test?
—I guess you didn’t realize the use the contexts.

A. you should have made of

B. you must have made from

C. of which you could have from
D. out of which you need make

(答案→)A. you should have made ofB. you must have made fromC. of which you could have fromD. out of which you need make解析：考查should与动词不定式的完成时连用的含义。should have done表示本来应该做而实际上没做，shouldn’t have done表示本来不该做但实际上做了。本题的问句意思是“我单选题为什么做得那么慢？”，回答“我想你没有意识到你本该好好利用上下文。”

这个答案应该是对的