第二部分：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）
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.--- Do remember to change the battery for 12 hours when you first use it.
--- ___________.
A. Thank you. I remember. B. What for?
C. Up to you. D. Got it.
22. --- Hi Susan, where were you at lunch time? I________ a seat for you in the coffee shop.
--- Oh, sorry to miss you. My political science class ran longer than usual.
A. am saving B. was saving C. had saved D. have saved
