单项选择题

They ________ the park of late.

A．will visit
B．have visited
C．are visiting
D．visited
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单项选择题
After traveling in the desert for many days, they found a tiny oasis, where there was a well and ________ green grass.
A．a patch of
B．a bunch of
C．a pinch of
D．a packet of
单项选择题
The matter is not to be ________.
A．watched for
B．waited on
C．taken over
D．trifled with
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