第二部分英语知识运用 （共两节，满分45分）
第一节：单项填空（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．April lst is day when strange things may happen and the best trick is that makes everyone laugh, including the “fool”.
A．the; one B．a; one C．the; the one D．a; the one
22．Dalian is well-known for its mild climate, but it be very cold in winter.
A．shall B．can C．should D．must
