【单选题】
Once environmental damage ______, it takes many years for the system to recover.
A. is to do
B. does
C. had done
D. is done
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答案
D
解析
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_____ her and then try to copy what she does.
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______ the War of Independence, the United States was an English colony.
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You shouldn't ______ your time like that, Bob, and was cold yesterdak tonight.
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Both the kids and their parents ____ English, I think. I know it from their accent.
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He opened the letter and it contained ___.
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