根据句意，用括号内所给单词的适当形式填空。

1. Along the street you can see many traffic           (sign).

2. The girl can't walk on because of            (hungry).

3. There were many           (home) children in the village after that earthquake.

4. Our English teacher once           (coach) several excellent students for the English contest.

5. There are all kinds of           (advertise) on TV these days, and we shouldn't believe all of them.

依据《合同法》对合同变更的规定，以下表述中正确的是( )。

A．不论采用何种形式订立的合同，履行期间当事人通过协商均可变更合同约定的内容

B．采用范本订立的合同，履行期间不允许变更合同约定的内容

C．采用格式合同的，履行期间不允许变更合同约定的内容

D．采用竞争性招标方式订立的合同，履行期间不允许变更合同约定的内容