—_________ times have you visited Gansu Science Museum? —Only once.

A.How often B.How many C.How long

I ___________this magazine for three months.

A. have bought B. have had C. have borrowed

—Mom, I’m 13 now. Can I ride a bike to school?

—Yes, you can. But you must follow the traffic ________ on the way.

A.rules B.plans C.safety

My little brother is a tidy boy. He always keeps his room _______.

A.clean B.cleaning C.to clean

—Mom, can I leave the chores till tomorrow?

—I’m afraid not. You can’t _____ today’s work till tomorrow.

A.put off B.turn down C.give away

She will call you if she ________.

A.will come back B.came back C.comes back

—________ my surprise, the twins have nothing _________ common.

A.With; in B.To; in C.In; in

—How is your English going?

—______. I can read pretty well and my writing has improved.

A.Not bad. B.Not yet. C.Not at all.

Our city is cleaner than it _________ be.

A.is used to B.used to C.uses to

-Sally, I heard you're going to America. will you stay there?

-Two whole years

A.How soon B.How often C.How long