44.—Why you stop him doing that —I my machine ,how could I A .didn’t ; operated B .didn’t ; was operating C .didn’t ; had operated D .don’t ; will operate

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44.—Why________ you stop him doing that —I ________ my machine ,how could I A .didn’t ; operated B .didn’t ; was operating C .didn’t ; had operated D .don’t ; will operate
44.—Why________ you stop him doing that —I ________ my machine ,how could I
A .didn’t ; operated B .didn’t ; was operating
C .didn’t ; had operated D .don’t ; will operate

44.—Why________ you stop him doing that —I ________ my machine ,how could I A .didn’t ; operated B .didn’t ; was operating C .didn’t ; had operated D .don’t ; will operate
B
why not do sth/why don't sb do sth:为什么不这句话的意思是你为什么不阻止他做那件事?我当时正在操作机器,我能怎么办?A 的operated 表示一次性的动作,而本题的要点在在于过去持续的动作.所以必须用过去完成时来表示在过去持续的动作.

选B.

选B.为什么你没有阻止他做那件事?我当时正在操作机器,我怎么能阻止他呢?

44.—Why________ you stop him doing that —I ________ my machine ,how could I A .didn’t ; operated B .didn’t ; was operating C .didn’t ; had operated D .don’t ; will operate Henry killed the dog.I'll ask him why________.B he did that D.he has done so选什么?是什么从句? 翻译——If you think you can,you can!? You ( (..) ) you you you you You you you you you you you ( (..) ) ,you! you you