He stopped ________ us before he climbed up the steps to the plane．

A．waving to

B．to wave with

C．waving with

D．to wave to

The magazine ________ once a month．

A．is come out

B．comes out

C．come out

D．is came out

This course covers many subjects, ________ English, history and geography．

A．such as

B．for example

C．and so on

D．in fact

Tom is a ________ boy．

A．five-years old

B．five-year-old

C．five year old

D．five-years-old

He's never visited China, ________ ?

A．hasn't he

B．doesn't he

C．is he

D．has he

Has he changed ________ the years?

A．before

B．after

C．over

D．since

People didn't have enough food in old ________．

A．time

B．times

C．year

D．month

Young people usually ________ city life to country life while old people ________ enjoy country life．

A．would rather; prefer

B．prefer; would rather

C．would rather; would rather

D．prefer; prefer

The food in the fridge ________ bad．Throw it away, please．

A．is smelt terrible

B．smells terrible

C．smells terribly

D．is smelt terribly

The factory ________ its waste into the river, but now it deals with the waste in a new way．

A．used to dump

B．is used to dump

C．used to dumping

D．is used to dumping