When ________ comes to research into heart disease and its effects on the body, we do not have adequate substitutes for the use of animals．

A．that

B．it

C．this

D．what

One of the best ways for people to keep fit is to ________ healthy eating habits．

A．grow

B．develop

C．increase

D．raise

The building around the corner caught fire last night．The police are now ________ the matter．

A．getting through

B．working out

C．looking into

D．watching over

A survey was carried out on the sleep time of students in middle schools, ________ were surprising．

A．its results

B．whose result

C．the results of which

D．of which results

－Do you have ________ for the party, Mary?

－No, we still have to get another five chairs and some fresh flowers．

A．something

B．everything

C．anything

D．nothing

Was it in 1969 ________ the American astronaut succeeded ________ landing on the moon?

A．when; on

B．that; on

C．when; in

D．that; in

－What do you remember Alexander Graham Bell as?

－________ inventor of ________ telephone．

A．an;/

B．the; a

C．the; the

D．/; the

－I hear that Mary won the prize of the biology contest．

－________ She was not interested in it at all．

A．You’re kidding!

B．So what?

C．Why not?

D．Not really．

－Do you mind if I carry on with my work while you ________ tea ready?

－________, of course not．

A．have made; No

B．are getting; No

C．will get; Yes

D．made; Yes

It was playing games ________ took the boy a lot of time ________ he ought to have studied his lesson．

A．that; when

B．which; during when

C．where; in which

D．in which;/