.No teachers are permitted ________ in the classroom or in the office.A．smokeB．s

题型：不详难度：来源：

.
No teachers are permitted ________ in the classroom or in the office.

A．smoke

B．smoking

C．to smoke

D．smoked

答案

解析

略

举一反三

.
______ in bed, the boy ______ to his mother saying that he had a bad headache.

A．lying; lay

B．lied; laid

C．Lying; lied

D．Laying; lain

题型：不详难度：| 查看答案

.
New policies, _______ to ensure that compulsory education is truly free, _______by the local government across China since the start of school on September 1.

A．intending; have been made known	B．intended; have been made known
C．intending; are made known	D．intended; had made known

题型：不详难度：| 查看答案

.
A fire broke out in a commercial mall unexpectedly the customers and the persons working there fleeing for safety

A．making

B．causing

C．forcing

D．sending

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.
Though the teacher had tried to make the problem easy__________, still Lily and her partner were at a loss.

A．understood

B．understanding

C．to understand

D．to be understood

题型：不详难度：| 查看答案

.
A volunteer is a person willing to help others, one who offers to do something without__________.

A．paying

B．paid

C．being paid

D．to pay

题型：不详难度：| 查看答案