Pollution problem is very serious. Can w_爱下问搜题

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问题选择题

Pollution problem is very serious. Can we _____?[ ]

A. work out

B. work out it

C. work it out

答案

答案：C

选择题

已知集合A={x∈R|lo

＞0}，B={x∈R|x²-x-2＜0}则A∩B=（　　）

A．（-1，2）

B．（-1，+∞）

C．（-1，1）

D．（1，2）

选择题

I ________ have used the computer without asking you first. [ ]

A. mustn't

B. needn't

C. shouldn't

D. can't