单项选择题

The children are to do their homework the moment they（）back school.

A．have arrived
B．had arrived
C．will arrive
D．would arrive

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单项选择题
The medicine is on sale everywhere, so you can get it at（）chemist's.

A．some
B．few
C．any
D．certain
单项选择题
According to the newspaper, more than one worker（）dismissed in this economic depression.

A．have been
B．are
C．has been
D．has
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