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We really don’t know ________ . Could you help us？

A. how to do B. what to do

C. to do what D. to do how

You should _______ the bus when it stops.

A. get off B. cut off

C. take off D. put off

—— How does Jack usually go to school?

—— He ________ ride a bike, but now he is used to ______ there.

A. used to; walk B. was used to; walking

C. was used to; walk D. used to; walking

—— Would you like ________ camping with me ?

—— I’d like to. But I’m busy ______ my homework.

A. to go ; to do B. to go; doing

C. going; to do D. going; doing

My bicycle doesn’t work. I’ll ask Uncle Wang __________.

A. fix it up B. to fix up it

C. fix up it D. to fix it up

This tall building has _______ floors. And Tony lives on the ______ floor.

A. twelve; twelve B. twelfth; twelfth

C. twelve; twelfth D. twelfth; twelve

________ a walk is good for your health.

A. Take B. To take

C. Taking D. To takeing

I think English is as _______ as math.

A. more interesting B. most interesting

C. the most interesting D. interesting

In order ____________ for the meeting, my sister had to get up early this morning.

A. not to be late B. not being late

C. to be late D. being late

Come on. Don’t stop. The _______ you work, the _______ grades you will get.

A. hardest; best B. hardly; well

C. harder; better D. hard; good