单项选择题

We should do everything in our power to develop ______alternatives to petrol.

A．audible
B．capable
C．liable
D．viable
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单项选择题
I didn't ______the meeting because I was ill.
A．join
B．enter
C．attend
D．appear
单项选择题
Death at last ______the woman patient from her pain.
A．got rid of
B．relieved
C．released
D．left out
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