Before using the machine, you must ____ carefully to these instructions. A join

题型：不详难度：来源：

Before using the machine, you must ____ carefully to these instructions.
A join B join in C take part in D attend

答案

解析

略

举一反三

After ten hours’ operation, the doctors managed to _____the one-year-old twins at the head.

A．isolate

B．separate

C．divide

D．remove

题型：不详难度：| 查看答案

Once ________ more attention, the little trees could have grown better.

A．given

B．to give

C．giving

D．having given

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She ____________ the path as the trees around her became thicker.

A．lost sight of

B．caught sight of

C．lost sight

D．caught sight

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The boy lay on his back, with his teeth______, his right hand_______, and his glaring eyes ________ _straight upward.

A．set, rising, looked	B．set, raised, looking
C．setting, raised, looked	D．to set, raising, looking

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We early to avoid the traffic，and it took us only half an hour to get here．

A．turned out

B．turned up

C．set off

D．set up

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