The book is borrowed from the library .You ___your children put dots andlines here and there.A.shouldn’t be letting B.needn’t have let C.ought not to have let to D.mustn’t have let为什么
问题描述：
The book is borrowed from the library .You ___your children put dots and
lines here and there.
A.shouldn’t be letting B.needn’t have let
C.ought not to have let to D.mustn’t have let
为什么
答
A.shouldn’t be letting 可以填 shouldn’t let.这里的进行时态是指always,一直不能这样.
如：He is always eating.含有告戒,警告等意思.