单项选择题

There was a heavy fog this morning, so none of the planes could ______.

A．get through
B．take off
C．pull out
D．break away
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单项选择题
All ______ he wants is the care of his parents.
A．what
B．thing
C．that
D．which
单项选择题
Why didn t you ______ that pencil which was on the floor
A．pick up
B．bring up
C．get up
D．put up
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