单项选择题

______the language in the town, he found it hard to get a piece of work.

A. Not knowing
B. Not know
C. Knowing not
D. Know not
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单项选择题
The early pioneers had to ______ many hardships to settle on the new land like the New World.
A. go along with
B. go back on
C. go through
D. go into
单项选择题
In case of something unexpected, it is advisable to ______your life against accident.
A. insure
B. ensure
C. assure
D. be sure
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