21．Tomorrow will be his ____________ (twenty) birthday.
22. This kind of bus is made in a ____________ (south) city.
23. I’d like to read novels ____________ (write) by Zhang Ailin.
24. Tom, those flowers in the garden are too dry. They need ____________ (water).
25. They met with many troubles on the way. What’s ____________ (bad), the weather was terrible the day.
