— When did you go to the zoo? — _____. A_爱下问搜题

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问题选择题

— When did you go to the zoo?

— _____.

A. Two days before

B. Two days ago

C. For two days

D. After two days

答案

答案：B

选择题

_________ is known to us all is that the old writer, for ________ life was hard in the past, still

works very hard in his eighties. [ ]

A. What; whose

B. It; whose

C. As; whom

D. What; whom

填空题

1987年蒙特利尔议定书主要针对（）环境问题。