单项选择题

Those were the graduate assistants ______ to do the research work in the lab.

A．to whom it was their responsibility
B．whose responsibility there was
C．whose responsibility was
D．of whom with the responsibility
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单项选择题
Railway workers joined in the strike because they ______.
A．attempted to halt the whole network for train travel
B．were dissatisfied with proposed rise in unemployment
C．were unhappy with their working conditions
D．wanted to support workers from other unions
单项选择题
People staged the strike against ______.
A．inflation
B．major domestic policy
C．pay and job cuts
D．employers' cruel exploitation
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