单项选择题

After days of ______ , the company executives and union officials agreed on contract conditions.

A．negotiations
B．specialty
C．composition
D．priorities
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单项选择题
The medical team ______ a breakthrough in their research on the treatment of cancer.
A．knew
B．did
C．made
D．gave
单项选择题
We had to take an ______ route because of the road construction on Lampton Avenue.
A．alternate
B．excessive
C．industrious
D．extraterrestrial
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