单项选择题

It"s high time we ______ our attention to this problem.

A．turned
B．turn
C．had turned
D．would turn

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单项选择题

The guard at the gate insisted that everybody ______ the rules.

A．obeys
B．obey
C．will obey
D．would obey

单项选择题

I ve tried very hard to improve my English. But by no means with my progress ______.

A．the teacher is not satisfied
B．is the teacher not satisfied
C．the teacher is satisfied
D．is the teacher satisfied

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