Chemicals in the body ________ our food into useful substance．

A．mix up

B．deal with

C．bring in

D．break down

When I stayed at Aunt Liu's, she would tell me about the great changes which ________ in the village．

A．have taken place

B．had taken place

C．took place

D．would take place

To do a bit for the motherland, ________

A．working hard is necessary

B．to learn a foreign language is needed

C．it is important to master science

D．one should serve the people whole heartedly

－Did everyone pass the examination?

－No, only three of them who passed it．

A．there was

B．it was

C．these were

D．that was

－Do you mind if I keep pets in this building?

－________

A．I'd rather you didn't actually

B．Of course not, it's not allowed here

C．Great!I love pets

D．No, you can't

Are the two glasses believed ________ by Tom?

A．broken

B．to be broken

C．to break

D．to have been broken

－Now that you like the garden so much, why not buy it?

－Well, I can't afford ________ garden．

A．such big a

B．that big a

C．a big that

D．so a big

－You seemed deeply struck by his skill．

－Not exactly so．It was his courage ________ his skill that really struck me most．

A．rather than

B．as well as

C．but also

D．not as

John is the only one of the students in the class that never ________ a mistake even when it is pointed to him．

A．admit making

B．admits making

C．admit to make

D．admits to make

Beijing is a large city ________ you can find many people from other countries．

A．that

B．which

C．where

D．there