单项选择题

The lift ______ , so we had to walk up the stairs.

A．break down
B．break up
C．break out
D．break through
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单项选择题
I remember seeing him some years ago, but I don't ______ where it was.
A．remind
B．recognize
C．recall
D．memorize
单项选择题
______ that the ancient Egyptians were highly organized and clever in building the pyramids(金字塔).
A．To believe
B．Believing
C．The belief
D．It is believed
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