根据句意及所给首字母写出句中所缺单词。

1. Don't b_____ late for class, boys and girls.

2. We can't listen to m_____ in class.

3. You have to wear your s_____ shoes for gym class.

4. There are 50 desks and chairs in our c_____.

5. What e_____do we have to do?

与全包价旅游相比，半包价旅游产品( )，增加了一定的消费灵活性。

A．降低了产品的直观价格
B．未包含中餐费用
C．未包含早餐费用
D．未包含晚餐费用