题目内容：

1.I have stopped smoking since 2002.(改为同义句）
I have _______ _______ smoking since 2002.
2.He decided to study English hard from now on.(同上)
He ______ _____ _____ ______ study English hard from now on.
3.He is very young .He can't go to school .(同上)
He isn't ______ ______ ______ go to school .
4.We don't know what we can do next.(同上)
We don't know ______ _____ ______ next.

优质解答

given up
made a decision to/made his mind to
old enough to
what to do