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

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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I was driving to work yesterday，and it （） as if smoke （） out of the exhaust pipe.

A.looks；looks
B.looked；looked
C.is；is
D.looks；looks

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