Asitis,theparents　　　　worryabouttheirchildren’sstudies.T...

問題詳情：

As it is, the parents　　　　worry about their children’s studies. They know quite clearly what to do at school.

ldn’t                 n’t                   ’t                       n’t

【回答】

D

知識點：虛擬語氣與情態動詞

題型：選擇題