You _______ wash your hands before meals. It is good for your health.

A. may            B. can

C. have better    D. should

You _______ walk across the road. It’s dangerous.

A. may not

B. don’t have to

C. mustn’t

D. needn’t

You’d better _______ too much meat. You are much too fat.

A. not eat          B. eat

C. not to eat       D. don’t eat

You should _______ the doctor’s advice and _______ the medicine on time.

A. follow; eat      B. take; eat

C. follow; take     D. eat; take

_______ necessary for us _______ our environment clean and tidy.

A. This is; keep

B. That’s; to keep

C. It’s; to keep

D. It’s; keep

She was afraid of __________SARS because it was dangerous.

A. catch           B. catches

C. caught         D. catching

-----Who taught _________Japanese?

----I learned it by ______________.

A. you, myself

B. your, I

C. yourself , me

D. yourself, myself

Humans can’t live _______air.

A. without          B. with

C. in               D. for

---Oh, you have a headache and a cough. _______have you been like this?

---Three days.

A. How long       B. How soon

C. How often      D. How many

I prefer_____ to ______.

A. sing, dance

B. singing, dancing

C. singing, dance

D. sing, dancing