单项选择题

He managed, with his friend's assistance, ______ the experiment before the building was locked.

A. being finished
B. be finished
C. to finish D, being finishing
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单项选择题
She was teaching me ______ you would teach a younger child to speak the language.
A. the way
B. in the way
C. a way,
D. to the way
单项选择题
If a substance is dissolved in water or heated, it may ______ a gas.
A. give into
B. give over
C. give off
D. give away
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