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标号涂黑。
21. Do you remember it was on ______ Saturday night that you saw such ______ bright moon?
A. a; a B. the; the C. a; the D. the; 不填
22. If I can help ______, I prefer living in Hangzhou because the weather here is better than ______ of Wuhan.
A. that; that B. it; it C. that; one D. it; that
