单项选择题

If the fire alarm is sounded, all residents are requested to ______ in the courtyard.

A．converge
B．assemble
C．crowd
D．accumulate
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单项选择题
Most electronic devices of this kind, ______ manufactured for such purposes, are tightly packed.
A．that are
B．as are
C．which is
D．it is
单项选择题
Husband and wife with a common duty to the country will find themselves ______closer together.
A．been drawn
B．to draw
C．drawn
D．drawing
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