单项选择题

In China，（）bicycle is（）popular means of transportation（交通）.

A.a；不填
B.the；a
C.the；the
D.a；the

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单项选择题
She was frightened and，（）what was wrong with him，at once rang up the doctor.

A.knowing not
B.not know
C.didn’t know
D.not knowing
单项选择题
The price of vegetables is（）than before

A.much cheaper
B.still dearer
C.even higher
D.a lot more expensive
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