1.Do you know Neil Armstrong?
--Yes.He is the first man _____ on the moon.
A.walk B.walks C.to walk D.walked
这一题正确答案是C,为什么选C?
2.There are _____ new words in this unit that I can hardly understand it.
A.so many B.so much C.too many D.too much
这一题正确答案是A,为什么选A?为什么不能选C?