Eating ______ candy is bad for your teeth. [ ]
A. too much
B. much too
C. too many
答案:A
— Your parents have never learned English, _____?
— Yes, they learned a little.
A.have they
B.haven’t they
C.didn’t they
D.don’t they
CO2在血液中的运输形式有()
A.氨基甲酰血红蛋白
B.碳酸氢根
C.二均有
D.二者均无