从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
21．--Sorry to have hurt you.
-- .You didn’t mean to, did you?
A．Forget it B．No problem C．All right D．Don’t say so
22．How close parents are to their children a great effect on the characters of the children.
A．have B．to have C．having D．has
