根据句子意思填空。

1. My sister and I ____________ students in the same school.

2. They ____________ trees last weekend.

3. Let's ____________ and ____________ basketball.

4. Ben ____________ tofu and vegetable ____________ much.

5. I ____________ to Beijing ____________ train last weekend.

6. I went to Shanghai. ____________ did you go ____________ your holiday?

为节省资源和减少污染，政府规定年产值万吨以下的造纸厂一律关闭，由此造成年生产能力在1万吨以下的造纸设备产生贬值。这种贬值属于( )。

A．功能性贬值

B．经济性贬值

C．实体性贬值

D．破产清算贬值