Teenagers ________ to choose their own lifestyles．

A．should be allowed

B．should allow

C．must be allowed

It's not necessary for parents to make their kids ________ the things they don't like．

A．to do

B．do

C．are doing

Neither you or he ________ Hawaii before．This time your dream will come true．

A．has gone to

B．have gone to

C．has been to

－I'm getting heavier and heavier．What should I do, doctor?

－You'd better eat ________ food and take ________ exercise．

A．more, less

B．more, more

C．less, more

－What are you going to do this summer vacation?

－Well, you know ________ volunteers will work for the Olympics in Beijing．I want to be one of them．

A．thousand of

B．thousands of

C．thousands

－Can Bill go to the New Year Concert tomorrow?

－________．He has to study for the math test．

A．That's right

B．No, he can't

C．Yes, he'd love to

－________ does Mary play sports?

－Once a week．

A．How long

B．How many

C．How often

－Do you know if he ________ to my party tomorrow evening?

－I think he will come if he ________ free．

A．will come, is

B．comes, is

C．comes, will be

His sweater is ________ of the two．

A．the nicest

B．the nicer

C．nicer

－Have you ever been to Tibet?

－Yes, I ________ there last year．

A．have gone

B．have been

C．went