17.I love junk food very much , but I try (eat ) only once a week .

三． 项项选择。

( ) 1. When I come home______ work, I felt very tired.

　　　　A. to B. from C. for D. at

( ) 2. I usually exercise ten ____ eleven times a week.

　　　　A. to B. at C. or D. in

( ) 3. I think I'm _____ unhealthy.

　　　　A. kinds of B. a litter C. kind of D. pretty very.

( ) 4. Is her pen the same ______ yours?

　　　　 A. at B. from C. as D. in

( ) 5. Maybe I'm not very healthy, ______ I have healthy habits.

A. and B. because C. although D. so

( ) 6. I love junk food very much, but I try to eat _____ only once a week.

A. its B. it C. them D. they

( ) 7. Can you play football _____ us? A. with B. for C. in D. and

( ) 8. This is an _____ lifestyle. A. healthy B. unhealthy C. unfriendly D. orange

( ) 9. _____ do you shop? I shop every week.

A. How many B. How much C. How often D. How far

( ) 10. A lot of vegetables help you keep ____ good health.

A. at B. in C. in D. on

( ) 11. He knows a lot ____ he is still a child. A. so B. although C. but D. or

( ) 12. His English isn't very good. You must _____ him.

A. try help B. trying to help C. try to helps D. try to help

四、句型转换。

1.She goes skateboarding once a week.(改为一般疑问句)

she once a week?