题目内容

They were taken ____________ when theynoticedthe metro cops were armed andloaded.

A. a back
B. back
C. aback
D. the back

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She took on the extra work with good ________________.

A. grace
B. attitude
C. mind
D. manners

As a result, workers who had been reliable now neglected their work.

A. already
B. hitherto
C. yet
D. not

What are you ______________ at?

A. talking
B. speaking
C. driving
D. telling

He must have an extremely strong constitution. What does constitution mean in this context?

A. health
B. muscules
C. will
D. law

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