题目内容

If I _____________his email address, I would have sent him a message yesterday.（2019年12月第26题）

A. have known
B. had known
C. will know
D. know

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John spent a lot of time ____________to his colleagues how challenging the priject was.（2019年12月第29题）

A. explain
B. explaining
C. to explain
D. explained

If you have dimeulty_____________ your bills, tell your utility company as soon as possible.

A. pay
B. paid
C. to pay
D. paying

After the bargaining process _______________, a final agreement was signed.（2018年12月第22题）

A. is completed
B. had been completed
C. has completed
D. had completed

If people don't like________________ by titles, you can ask them how they prefer to be addressed.（2018年12月第30题）

A. are called
B. being called
C. be called
D. called