单项选择题

In China as well as many other countries around the world，greathave been made to reduce the amount of carbon emission.

A．affects
B．efforts
C． affords
D．effects
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单项选择题
With an examination，the students felt relaxed and enjoyed themselves the whole night.
A．to take
B．being taken
C．taking
D．taken
单项选择题
—he managed to get the information—Oh, a friend of his helped him.
A．Where was it that
B．What was it that
C．How was it that
D．Who was it that
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