1. 动物园为濒危动物们提供家园并且帮助教育公众关爱它们。  
    Zoos ______ homes ______ many endangered animals and help to educate the public about
    ______              them.
2. 你能告诉我你什么时候看完这些VCD 吗？    
    Can you tell me when you can ______              these VCDs?
3. 昨天下午，我到家时妈妈正在上网。    
    Mother                             the Internet when I reached home yesterday afternoon.
4. 冰箱是用来为食物保鲜的。    
    A refrigerator______              for              the food cool and fresh.
5. 那些无家可归的孩子在救护村里得到了很好的照料。    
    Those homeless children      ___       ___  (look) after in the SOS Village.