第二部分 英语知识运用（共两节，满分35分）
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，并在答题卡上将该项涂黑。
21． It took building supplies to construct these energy-saving houses．It took brains， too．
A． other than B． more than C． rather than D． less than
22． So far， several cases of a disease， as A/H1N1 flu， are reported to have been found in the country．
A． knowing B． to be known C． having known D． known
23． At the beginning of a speech， it is very important to grab the audience's attention and make them interested in you have to say．
A． which B． what C． that D． who
