单项选择题

Not only the switches but also the old wiring ______ changed.

A．have
B．are
C．have been
D．has been

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单项选择题

So quickly ______ their work that they were given a bonus.

A．did the workmen finish
B．the workmen finished
C．the workmen finish
D．do the workmen finish

单项选择题

She always buys ______ my birthday.

A．anything nice to
B．anything nice for
C．something nice to
D．something nice for

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