常用的消毒剂有（）
A.高锰酸钾
B.甲酸
C.硫酸
D.盐酸
E.甲醇
参考答案：A
---What’s wrong with you?
---I have a _______. Because I ate too much yesterday.
A．sore throat
B．headache
C．sore back
D．stomachache
-----Your pen is very nice. -----_________.
A. OK B. No, it isn’t C. Thank you
