单项选择题

______ to land on the island several times, the pilot sent a radio message to the headquarters to ask for help.

A. Having failed
B. Failing
C. Had failed
D. Failed
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单项选择题
My sister wanted to look for a job here ______ her abilities.
A. suited to
B. suiting to
C. suited
D. and to suit
单项选择题
______ any foreign language and having no special skills, he finds it hard to get a job in this very competitive world.
A. Knowing not
B. Knowing no
C. Not knowing
D. Having known no
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