用所给单词的适当形式填空。

1. There ________(be) a teacher and thirteen students in the room.

2. His sister is very _________(help). She always helps others.

3. Her father cleans his car ________(two) a week.

4. Tom and Jack often practise ________(speak) Chinese.

5. Lily ________(not go) to school on Saturdays and Sundays.

各级税务机关聘用的从事税收工作的临时人员、（）等不核发税务检查证。

A.协税员

B.助征员

C.代征员

D.税收管理员