单项选择题

______ I feel pity on hurricane victims in Southeast Asia, I can't really do very much to help them but contribute my pocket money.

A. As long as
B. When
C. While
D. Even
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单项选择题
We were just ______ calling you up ______ you came in, ______ was unexpected.
A. about; when; that
B. on the point of; as; as
C. on the point of; when; which
D. on the point of; as; as
单项选择题
______ you may be right, I can't altogether agree.
A. While
B. As
C. if
D. Since
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