单项选择题

If the ships were the most ______ sink, they are rated as A1 by insurance companies.

A．able to
B．capable of
C．unlikely to
D．impossible of
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单项选择题
I didn't know ______ or stay here.
A．either to go
B．whether to go
C．if to go
D．if that I should go
单项选择题
Hunters learned to follow and read the information ______ animals.
A．left behind
B．to leave
C．leaving behind
D．being left
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