1. “How often do you take the medicine ？”

“______ four hours.”

A. For

B. Any

C. Every

D. Each

【答案及解析】答案选 C。

2. “Is this bike yours？”

“No， it's ______.”

A. Bob

B. Bobs

C. Bob's

D. Bobs'

【答案及解析】答案选 C。

3. “Is there ______ good on TV this evening？”

"Sorry， nothing good. "

A. nothing

B. something

C. anything

D. everything

【答案及解析】答案选 C。肯定句中用something，否定句和疑问句中用anything.

4. You have a good suggestion， but it's not as practical as _______.

A. he

B. him

C. his

D. her

【答案及解析】答案选 C。

5. A chemist prepares his experiments carefully before trying to carry _____ in his lab.

A. it out

B. out it

C. them out

D. out them

【答案及解析】答案选 C。carry out 实施 宾格放在词组中间，名词放在词组后面。如，carry out his experiments.