单项选择题

I was ______ which country to visit in the coming summer vacation.

A．worrying
B．doubting
C．finding
D．wondering
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单项选择题
As Edison grew ______, he never lost his interest in science.
A．elder
B．older
C．the elder
D．the oldest
单项选择题
You can drive your own car ______ you have passed the driving test.
A．even if
B．as if
C．now that
D．so that
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