The classroom every day.A．should cleanB．should be cleanedC．should cleane

题型：不详难度：来源：

The classroom every day.

A．should clean

B．should be cleaned

C．should cleaned

D．should be cleaning

答案

解析

由题意可知用被动语态。

举一反三

— At present, one of the best ways to study is working in groups.
—More chances _______ to students to learn from each other.

A．offer	B．is offered
C．are offered	D．have offered

题型：不详难度：| 查看答案

They are looking forward to _____________ to the lecture by the famous professor.

A．send

B．be sent

C．being sent

D．sending

题型：不详难度：| 查看答案

----Bad luck! It’s too late!
----It doesn’t matter. The movie _______for only a few minutes. You can’t miss it.

A．has been on	B．has begun
C．began	D．was on

题型：不详难度：| 查看答案

—Oh, my God! I can’t find my key to the office.
—Don’t worry. Perhaps it______________ in your home.
A. left B. has left C. was left

题型：不详难度：| 查看答案

Food safety is important. Rules must ________ stop people from food pollution.

A．be made

B．be made to

C．make

D．make to

题型：不详难度：| 查看答案