21. You are driving me mad, Jack! My patience is _______ .
A. using up B. running out of
C. getting out D. giving out
【解析】选D。句意为:杰克,你让我发疯!我的耐心到了极限。此处give out 表示“用完、耗尽”,若选B则应去掉of,如果选A项,则需用其被动形式。
22. —Did you listen to Mr Jackson’s lecture?
—Yes, I have never heard a _______ one.
A. more exciting B. more excited
C. most exciting D. most excited
【解析】选A。考查比较级表达最高级的意思。句意为:——你听Jackson先生的演讲了吗?——听了,我从来没听过比这更令人激动的演讲了。先排除C、D。演讲应是令人激动的,因此需用v. -ing形式的形容词。