为及时（），必须尽快探找到进水口的准确位置或大致位置。
A.掌握出水量
B.截断漏洞水源
C.分析成因
D.观察发展
参考答案：B
— Did you see who the driver was?
— No, the car ran so fast ____ I couldn't have a good look at his face. [ ]
A. that
B. which
C. as
D. after
经灭菌处理的回收食品可以作为原料生产的食品。
