______she_____English? [ ]
A. Can; speak
B. May; tell
C. Can; say
D. May; speak
答案:A
This clothes store was open ______ April 15th 2003. [ ]
A. on
B. in
C. at
D. of
目前油田注水使用的水处理添加剂主要有絮凝剂、混凝剂、杀菌剂、阻垢剂、()、除氧剂、PH调节剂、()等8大类。