Be careful not to involve yourself .
查看答案
They soon developed a very close relationship.
A. 对
B. 错
This is an unusual opportunity that will lead your to success,
A. 对
B. 错
It is hard _old people to change their ways.
A. to
B. of
C. to
D. in
Teachers devotes themselves _the cause of aducation.
A. to
B. of
C. in
D. to
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