单项选择题

Our boss, Mr. Thompson, ________ a raise in salary for ages, but nothing has happened yet.

A. was promising
B. has been promising
C. promised
D. has promised
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单项选择题
Modern appliances ________ us from a good deal of household work. For instance, the dryer frees us from hanging the laundry.
A. escape
B. benefit
C. liberate
D. comfort
单项选择题
The fox fell into the _______ the hunters had, set for it.
A. bush
B. trap
C. trick
D. circle
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