单项选择题

______ noticed that the sun came out.

A．I've just
B．I could usually
C．I could
D．I would
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单项选择题
Only one baby ______ the big fire.
A．saved
B．was saved
C．survived
D．was survived
单项选择题
Millions of people are ______ in health by the polluted environments.
A．affect
B．effect
C．affected
D．effected
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