第一节单项填空（共15小题；每小题1分，满分15分）
请认真阅读下面各题，从题中所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
21.When you meet with difficulties, don’t lose heart! Everything will all right in the end.
A. go out B. work out C. fall out D. figure out
22.Dear me! Just look at the time! I no idea it was no late.
A. had B. have had C. have D. was having
23.Never he sad about buying that big house. In fact, nothing in the world is more valuable than happiness and health.
A. psychological B. chemical C. physical D. medical
