单项选择题

"______ the United States" "Yes, we went there on business last month."

A．Did you go
B．Have you gone to
C．Have you ever been to
D．When did you visit
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单项选择题
She made the request that all the problems of pollutions ______ at the next meeting.
A．is being discussed
B．was being discussed
C．be discussed
D．would be discussed
单项选择题
Seen from the plane this city seemed to be ______ it is.
A．10 times smaller than
B．no more than 10 times
C．10 times smaller as
D．as 10 times small as
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