某连锁店有客房120间，现有维修工2名，平均每天检查保养客房6间，请问需要（）天才能将全部客房保养一遍。
A.10
B.20
C.30
参考答案：B
请根据句意、括号中的中文提示或英文释义，写出句中所缺单词，使句子通顺。
1. Parents shouldn’t leave their babies (单独) at home.
2. She was always (紧张) about travelling by air.
3. My sister was born on 2nd, two days after Halloween.
4. Tom, would you ( give a description of )your feelings of watching
Titanic3D?
5. Simply close your eyes and deeply, and you will be calm and relaxed.
根据《税收征管法》的规定，违反税收法律、行政法规应当给予行政处罚的行为，在( )年内未被发现的，不再给予行政处罚。
A．5
B．4
C．3
D．2
