1.Billy has difficulty _____the rest of the class.A.to keep up with B.to keep upC.keeping up with D.keeping on正确答案是C2.The passengers were robbed ______all their money.A.of B.off C.from D.away正确答案是A3.People who won'twork should be

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1.Billy has difficulty _____the rest of the class.A.to keep up with B.to keep upC.keeping up with D.keeping on正确答案是C2.The passengers were robbed ______all their money.A.of B.off C.from D.away正确答案是A3.People who won'twork should be

1.Billy has difficulty _____the rest of the class.A.to keep up with B.to keep upC.keeping up with D.keeping on正确答案是C2.The passengers were robbed ______all their money.A.of B.off C.from D.away正确答案是A3.People who won'twork should be
1.Billy has difficulty _____the rest of the class.
A.to keep up with B.to keep up
C.keeping up with D.keeping on
正确答案是C
2.The passengers were robbed ______all their money.
A.of B.off C.from D.away
正确答案是A
3.People who won'twork should be made _____.
A.to work B.work
C.working D.to be working
正确答案是A

1.Billy has difficulty _____the rest of the class.A.to keep up with B.to keep upC.keeping up with D.keeping on正确答案是C2.The passengers were robbed ______all their money.A.of B.off C.from D.away正确答案是A3.People who won'twork should be
1..首先知道词组have difficulty (in)doing sth就可以排除AB
c.keep up with跟上(Billy很难跟上其他同学)
d.keep on保持,根据意思排除
2..rob sb of sth 抢某人某物
steal sb sth偷某人某物
这个句子用了被动语态
3..make在这里做使役动词
make sb do sth 变被动词要变为sb be made to do sth
和他相同的还有感官动词,如see sb do sth变被动变为sb be seen to do sth

1 have difficulty doing sth.艰难地做某事
keep up with sb./sth.跟上某人/事
2 rob sb. of sth.抢劫某人的某物
这里是被动式
3 make sb. do sth.叫某人做某事。to省略。但被动式时to要还原,
即sb. be made to do sth.