一、单项选择(每小题1分，共20分)从A、B、C、D四个选项中选择可以填入空白处的最佳答案。( ) 1. We learned a lot _ animals in the zoo. A.in B. with C. about D. for ( )2. _? They went to summer camp. A. When did they go camping B. Where were they camping C. What did they do on vacationD. Why did they go on vacation( ) 3. I want to know _ to make a model plane. A.who B. where C. what D. how ( )4. _ did
