You must concentrate more ______ your English. [ ]A. toB. in C. on D. at

题型：同步题难度：来源：

You must concentrate more ______ your English. [ ]
A. to
B. in
C. on
D. at

答案

举一反三

We should learn ______ each other. [ ]
A. to
B. from
C. for
D. of

题型：同步题难度：| 查看答案

Mrs. Brown isn"t here. She has to ______ her baby at home.

[ ]

A. look at
B. look for
C. look like
D. look after

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— There is a ticket on the floor, is it yours?
— Oh, yes, it"s mine.
— Let me _____ for you. [ ]
A. to pick up it
B. to pick it up
C. pick up it
D. pick it up

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I"m sure scientists will a way to solve the problem of sand storm (沙尘暴). [ ]
A．set off
B．catch up with
C．begin with
D．come up with

题型：广东省竞赛题难度：| 查看答案

— for the glass!
— It"s OK. I"m wearing shoes. [ ]
A．Look out
B．Walk out
C．Go out
D．set out

题型：广东省竞赛题难度：| 查看答案