从A、B、C、D四个选项中，选出可以填人空白处的最佳选项，并在答题卡上将该项涂黑。
21．When you listen to people talk or read something without a title，try to invent title
that summarizes main ideas．
A．the；a B．the；the C．a：a D．a：the
22．—You can’t imagine fantastic fun web chatting is．
—Really? But it may cause a lot of trouble sometimes．
A．what B．how C．why D．so
23．－Bruce was killed in a traffic accident．
－ I tailed with him yesterday morning!
A．What a pity! B．I beg your pardon?
C．Sorry to hear that． D．Is that so?
24．Some friends tried to settle the quarrel between Mr. and Mrs. Brwn without hurting the feeling of ,but failed．
