具有较好的耐久、耐磨性能和装饰性，但造价较高的地面类型是( )。

A．天然石地面
B．木地面
C．人造石地
D．塑料板块地面

Look and answer.

1. A: What did he do last weekend?

    B:                               .

2. A: What are they going to do?

     B:                               

3. A: What's the matter, Helen?

    B:                                .

4. A: What did she do yesterday evening? 

    B:                                .