Unit 2 He's riding his bike,but it starts to rain. 一、选出不同类的单词。( ) 1. A. drumB. suonaC. rain( ) 2. A. havingB. ridingC. ring( ) 3. A. rainB. snowC. cold( ) 4. A. planeB. trainC. phone( ) 5. A. andB. ofC. but二、根据首字母提示完成单词。1. The teachers and pupils are having...