30.________ by a crowd of people, I felt nervous, ______ what to say.

30.________ by a crowd of people, I felt nervous, ______ what to say.

题目
30.________ by a crowd of people, I felt nervous, ______ what to say.
A.Watching, didn't know
B.Having watched, and not knew
C.Having been watch, not known
D.Being watched, not knowing
答案为D. 请问为什么不能用A
答案
首先,句子的意思是:由于被一群人看着,我感到很紧张,不知道说什么.所以,第一空是表示的是被动,要用Being watched;第二空如果要用didn't know 的话,应该在前面加and,作为逗号后面的动词与前面的连接.D中用的not know...
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