单项选择题

I have been trying to quit smoking.

A. give up
B. pick up
C. build up
D. take up
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单项选择题
The economy continued to exhibit signs of decline in September.
A. play
B. send
C. show
D. tell
单项选择题
These are defensive behavior patterns which derive from our fears.
A. stem
B. rely
C. develop
D. grow
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