I try to eat junk food only once a month ________ I love it．

A．through

B．but

C．and

D．although

________ homework, we do their homework on Sunday．

A．As for

B．As to

C．As of

D．As from

－How often are the Olympic Games held?

－________ four years．

A．Every

B．Each

C．In

D．For

Picking apples is ________ than having class．

A．many better

B．much good

C．much better

D．more good

Tom ________ playing compute games, doesn't he?

A．are

B．is

C．enjoys

D．wants

The ice isn't ________ to skate on．

A．thin enough

B．enough thin

C．thick enough

D．enough thick

－Are you going to ________ your friends to your party?

－Yes, sure．

A．like

B．want

C．make

D．invite

－Must I clean the floor now?

－________．It is too dirty．

A．Yes, you needn't

B．No, you needn't

C．No, you mustn't

D．Yes, you must

These aren't my keys．Mine ________ in the drawer．

A．is

B．are

C．am

D．were

The old man is too tired ________ go any further．

A．enough

B．can't

C．to

D．so