题目内容

单流程不允许返回到初始状态（）

A. 对
B. 错

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I have lived here ________at least twenty years.

A. for
B. since

I _____ to take a good holiday this year, but I wasn't able to get away.

A. hope
B. have hoped
C. had hoped
D. hoped

I hope you______ the instructions ready before I come tomorrow.

A. to get
B. shall get
C. will get
D. will have gotten

______ a survey is often a useful way of finding something out.

A. Conduct
B. Conducting
Conducted
D. Conducts