用place短语的适当形式填空。

1. A little gratitude would be ____.

2.I' m at a loss what to do next. What would you do (if you were )____ ?

3. Plastics have ____ manyother materials.

4.  We use plastics _____ many other materials.

5. While the manager was on holiday, he ___.

材料费控制中，以下作法不利于降低工程成本的是（）

A.在材料采购过程中，尽量降低材料买价和运输费用

B.在材料领用过程中，采用限额领料的“一张表”

C.在材料保管过程中，防止材料失窃

D.在材料堆放、使用工程中，发生二次搬运