单项选择题

Scientists have reached the conclusion ______ the temperature on the earth is getting higher and higher.

A. when
B. that
C. but
D. where
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The manager is satisfied with ______ you' ve done.
A. that
B. all what
C. all that
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This is the same book ______ I read last week.
A. which
B. what
C. where
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