单项选择题

（）country in the world should do her best to keep the world peace.

A. Each
B. All
C. Every
D. Everyone

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单项选择题
We（） 5 hours writing the plan for our work next month.

A. cost
B. spent
C. took
D. spare
单项选择题
Hardly （） when it began to rain.

A. had he arrived
B. arrived he
C. he had arrived
D. did he arrive
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