第二部分：英语知识运用（共两节, 满分45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．About fifth of full-time students who attend a community college do not return for ___ second year, according to an analysis released last fall by ___American institutes for Research．
A．a; 不填 B．the; 不填 C．a; a D．a; the
22．7'he Maoris were the first ____in Australia, but were treated unfairly after the arrival of the European settlers．
A．to settle B．having settled
C．settled D．settling
23．AD parents want their children to be happy, but they ignore the fact that children's _____ building includes learning through frustrations and mistakes．
A．respect B．character
