He will show his new CD player to you as soon as he ____ his letter.

A.  finishes writing    B.  will finish to write    C.  finishes to write

在确定材料定额消耗量时，利用实验室试验法主要是为了编制（）。

A.材料损耗定额

B.材料净用量定额

C.材料消耗定额

D.劳动定额