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.—Putting on a happy face not only helps us make friends but also makes us feel better.
—_________.
A. I’ m with you on that B. I’ d love to C. It’ s up to you D. It’ s my pleasure
22. The young teacher made ________ silly mistake and out of _________respect for his feelings, I didn’t point it out in class.
A. the; the B. the; / C. a; the D. a; /
