单项选择题

They had to face up to innumerable ______ before they achieved their goal.(2006年中国矿业大学考博试题)

A．slashes
B．setbacks
C．shutters
D．slacks
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单项选择题
If you ______ the bottle and cigarettes, you’ll be much healthier.(2013年北京航空大学考博试题)
A．take off
B．keep off
C．get off
D．set off
单项选择题
The problem of pollution as well as several other issues is going to be discussed when the Congress is in ______ again next spring. (2005年清华大学考博试题)
A．convention
B．conference
C．session
D．assembly
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