第二部分：英语知识运用（共两节，满分35分）
第一节：语法和词汇知识（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，并在答题卡上将该选项的标号涂黑。
21.A boy rushed in_____________he opened the door
A the moment B for the moment C for a moment D at the moment
22.____________ abroad for two years ,he will come back within two weeks
A Having studied B Studied C To study D Studying
