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.