用所给词的适当形式填空。 |
1. _____ ( eight, year, old) should be allowed to drive. 2. Anna wants to get her ears_____ ( pierce). 3. Young trees should _____( water) as often as possible. 4. You need ______ (wear) warm clothes, or you'll catch a cold. 5. The old should __ (speak) to politely. |