单项选择题

The plane was circling over the landing field for 15 minutes when the pilot was told that he should use the Westside Field.（）

A. is
B. would be
C. has been
D. had been

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单项选择题
He was greatly vexed by the new and unexpected development.（）

A. astonished
B. annoyed
C. enlightened
D. contented
单项选择题
There has been enough playing around, so let’s get down to business.（）

A. begin our work
B. make a deal
C. reach an agreement
D. change our plan
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