单项选择题

It was in the year 1999 （） John Smith found a way to send messages on the Internet.

A.in which
B.that
C.when
D.which

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单项选择题
He knows nothing about the accident （） he read in the paper.

A.except what
B.except for
C.except that
D.except
单项选择题
We depend on the sun's rays. for the light and warmth which （） us alive.

A.keep
B.keeps
C.kept
D.is keeping
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