________does he use the Internet a week?---Once.

A. How

B. How often

C. How long

D. How many times

Some children watch TV three___ four ___a week.

A. and； timesB. or； times C. and； timeD. or； time

Both Jim and Sam love junk food， ________they try to________ only once a week.

A. but； eat it B. and； eat themC. and； eatD. but； eat

My computer doesn't work now， there must be with it.

A.wrong something B.something wrong

C. wrong anything D. anything wrong

Two percent of the homework _____ about math.

A. isB. areC. be D. to be

The answers_____ our questions are different.

A. ofB. to C. atD. off

_____he was tired， _____he didn't stop to have a rest.

A. Though； but B. Though； /C. But； thoughD. /； /

Sam is ________than I at English.

A. more good B. much good

C. much better D. more better

Jim's parents enjoy ________in the countryside.

A. to live B. live C. livingD. lives

She often planssomething to help others.

A. to doB. does C. do D. Doing