We should________the lights when we leave our classroom because we mustsave elec

题型：同步题难度：来源：

We should________the lights when we leave our classroom because we must
save electricity.                   [     ]
A. switch on
B. switch over
C. switch off
D. switch through

答案

举一反三

The terrorists might have planted a bomb on a plane in Athens,set to________when it arrived in New
York.[     ]
A. get off
B. carry off
C. go off
D. come off

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Stella was disappointed to find her new plan _____ and fell into great depression.[ ]
A. set down
B. turned down
C. calmed down
D. written down

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His determination and devotion to science________his great discovery.[     ]
A. contributed to
B. lied in
C. resulted from
D. brought about

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With no one to________in such a frightening situation,she felt very helpless. [    ]
A. turn to
B. turn on
C. turn off
D. turn over

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The fire out of control,all the houses were________ . [ ]
A. burnt off
B. burnt out
C. burnt up
D. burnt to the ground

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