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87．fix up安裝

They are busy fixing up the lights．

86．feed on以……為主食

It feeds on a certain kind of fish．

feed…on用……喂養(yǎng)

What do you feed your dogs on?

85．drop out(of)輟學(xué)；中途退出

If you don’t like the idea, drop out．

84．dream of／about夢(mèng)想；想到

I never dream of its hurting you．

83．clean up收拾；整理

You should always clean up after a picnic．

82．a(chǎn)ccount for說(shuō)明原因解釋

He couldn’t account for his absence from sch001．

81．take…into consideration考慮到

These were a11 factors which hed to be taken into consideration．

80．concentrate(…)on專心于，聚精會(huì)神于

P1ease concentrate on the lesson．

79．cool off變涼，冷卻，冷靜

It cooled off after the downpour last night．

78．cheat…of騙取某人某物

He cheated me(out)of my money．