一Are you going to Guilin by plane?一It’s fast but expensive, so I’m not sure．I __

题型：不详难度：来源：

一Are you going to Guilin by plane?
一It’s fast but expensive, so I’m not sure．I ________ take a train．

A．should

B．may

C．must

D．will

答案

解析

试题分析：句意：你打算乘飞机去桂林吗？乘飞机快但是贵，所以我不确定，我可能坐火车。must,can(could),may(maight) 可以表示猜测，must 表示肯定猜测，用于肯定句，肯定……，一定……；can’t,表示否定猜测，肯定不……，另外can(could),may(maight)，表示可能性猜测，可能……。根据I’m not sure，可知猜测的可能性比较小，故选B

举一反三

— Must I finish my homework now, Mum?
—No, you _____. You can do it tomorrow.

A．mustn’t

B．needn’t

C．can’t

D．shouldn’t

题型：不详难度：| 查看答案

-- Are these _______ all from No. 2 Middle School?
-- Yes. They often _________ their free time to help the old here.

A．volunteers; volunteers	B．volunteer; volunteers
C．volunteers; volunteer	D．volunteer; volunteer

题型：不详难度：| 查看答案

---Dad, must we wait until the light becomes green?
---Yes,I’m afraid we .That’s the traffic rule.

A．can

B．may

C．have to

D．need

题型：不详难度：| 查看答案

All of us must do_______ to help protect the environment，or we will have more hazy weather雾霾天气.

A．something useful

B．anything useful

C．useful something

D．useful nothing

题型：不详难度：| 查看答案

—I ________ speak English in class because I’m afraid of making mistakes.
—Don’t be shy. Believe in yourself and everything will be OK.

A．needn’t

B．dare not

C．dare not to

D．needn’t to

题型：不详难度：| 查看答案