英语选择.填空.连词成句1.i saw him yesterday.he__to America.A.mustn't have been.B.mustn't have gone.C.can't have gone.D.can't have gone.2.the old man__（retire)two years ago3.he said that he__(can)help me whit my work.4.let me__(introduce)my friend to you.5.he__(live)here since he was young.6.Today is his__(six)birthday.7.(陈述句）the.mother.boy's.let.will.swim.him.not.the.in.river.

1 can't have gone
2 retired
3 could
4 introduce let sb do sth
5. had been living 过去完成进行时
6. sixth 序数词 第六个
7.The boy's mother will not let him swim in the river

根据首字母填空： --Who

1.C\D retired could introduce has been lived sixth The boy's.mother will not let him not.swim in.river。

1 can not have gone have been 意为去过这个状态 have gone 指这个动作
2 retired
3 could
4 introduce
5. has been living
6. sixth
the boy's mother will not let him swim in the river

A
我昨天才见到他,他一定没去美国.
retired
could
introduce
has been living
sixth
The boy's mother will not let him swim in the river.男孩的母亲不会同意他在河里游泳.