请用所给动词的适当形式填空。

1. We ______________ (have) a picnic tomorrow.

2. My brother ______________ (go) to Xi'an next Sunday.

3. What ______________ you ______________ (do) next weekend?  I______________ (collect) stamps.

4. Where ______________ she ______________ (work) next year?  She ______________ (work) in a

    computer company.

5. What ______________ you going to ______________ (buy) next holiday?  I ______________ (buy) some

    postcards for my friends.

碳钢管普通防腐层第一层(从金属表面算起)所用材料为______。

A．冷底子油

B．沥青玛碲脂

C．防水卷材

D．保护层材料