题目内容：

My sister isn't old enough to go to school.同义句
1.My sister is ---- ----- ----- go to school.
2.Shall we go for a picnic tomorrow?同上
---- ----- go for a picnic tomorrow?
3.他太激动了,一句话也说不出来.【英语】
安娜太小了,还不能上学.
树上的一片树叶足以使她非常高兴.

优质解答

1 too old to
2 Why not
3 He is too excited to speak.
4 Anna is too old to go to school.
5 A leaf on tree is enough to make her very happy.