单项选择题

It is difficult to （）a conversation with all this noise around us.

A．carry on
B．account for
C．bring up
D．get through

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单项选择题

Maggie ran back to the kitchen, eggs （）carefully in her hands

A．to be held
B．held
C．were held
D．holding

单项选择题

（）in 1943 （）the harmful smog made its appearance in Los Angeles.

A．Only/that
B．It was/then
C．That it was/when
D．It was/that

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