单项选择题

It is essential that we __________ measures to protect the ozone layer.

A．will take
B．should take
C．would take
D．took
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单项选择题
I lost my bag the day before, but it __________ now.
A．has found
B．was found
C．has been found
D．is found
单项选择题
The area of Beijing is about __________ that of my hometown.
A．5 times as larger as
B．as 5 times large
C．as 5 times larger than
D．5 times as large as
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