单项选择题

He let me use his computer and ______ return I treated him to dinner.

A. for
B. as
C. in
D. of
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单项选择题
His few personal belongings made it possible for him to move from place to place （）

A. in ease
B. at ease
C. with ease
D. with easiness
单项选择题
Television is another major instrument of communication,（）us to see as well as to hear the performer.

A. permitted
B. permitting
C. to permit
D. have permitted
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