1.It's very kind of somebody do还是doing？
2.As soon as he opened the present,he couldn't help _____(laugh) beacuse it was his favourite book.
3.The students each have/has a computer in class.
4.—At that time I could hardly believe my eyes
—_____________.
A.So could I
B.So I could
C.Nor could I
D.Nor I could.
5._______we had!
A.How a fun B.What fun C.What a fun D.How fun
4、5题解释一下原因，谢了~
1, to doit 是形式主语 不定式是真正的主语2， laughing can't help doing sth 是忍不住做什么事3，has ，each 后面跟单数动词4，C could hardly 是几乎不能 是否定 所以我也是 就应该是 Nor could I 5，C havefun玩的开心whatfun we had！ what 后面加名词How 后面加形容词或者副词用how 的话 应该是how funny we were！...
