第一节 单项填空(共15小题；每小题1分，满分15分)
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．________ to pass the 2010 college entrance examination made our whole family unhappy.
A．My son failed B．My son's failing
C．My son failing D．My son having failed
答案与解析：B 考查动名词的复合结构作主语的用法。句意：我儿子未能通过2010年大学入学考试，这使得我们全家人不愉快。根据句意和选项可知这里应该用动名词的复合结构，即“名词所有格(或形容词性物主代词)＋动名词”，故选B项。
22．When I was twenty, I had to drop out before graduation and work in a clothes shop to help ________ my family.
A．supply B．support
C．suppose D．stop
答案与解析：B 句意：20岁的时候，我不得不在毕业前退学到一家服装店工作来帮助家里维持生计。support“养活；支持；扶持”；supply“供应”；suppose“假定”；stop“停止”。
23．It is said that Chen Shuibian is ________ to flee from Taiwan because of the campaign against him.
A．possible B．perhaps
C．probable D．likely
答案与解析：D likely的主语可以是人，也可以是物，可用于sb. be likely to do sth.结构。possible和probable不以人作主语；perhaps是副词。
24．He feels relaxed and even begins to whistle because ________ of the distance ________ covered.
A．three fifth; were
B．three fifth; was
