单项选择题

It sounds （） the problem is in the engine.

A.like
B.as
C.although
D.if

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单项选择题
The light from a laser，（） in only one direction and （） in a narrow beam，is much stronger.

A.moves；moves
B.moving；moving
C.moving；moving
D.moved；moved
单项选择题
It （） to have been ready last week.But you haven’t done it.

A.supposes
B.is
B.was
C.supposed
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