第一部分：英语知识运用（共两节，满分45分）
第一节：语法和词汇知识（共15小题，每小题1分，满分15分）选出最佳选项，并在答题卡上将该项涂黑。
1. She had just finished her homework _____ her mother asked her to practice playing the piano yesterday.
A. while B. when C. after D. since
2. —I’m sorry, but there’s no smoking on this flight.
—Oh, I______ that. Sorry, I won’t again.
A. don’t know B. didn’t know C. won’t know D. haven’t known
