问题 选择题 选出每组单词中不同类的单词。( ) 1. A. building( ) 2. A. table( ) 3. A. do( ) 4. A. sing( ) 5. A. my( ) 6. A. onB. houseB. lakeB. clean B. bookB. herB. inC. bridgeC. grassC. tableC. playC. sheC. yellowD. cloudD. treeD. sweepD. danceD. yourD. under 答案 1. D 2. A 3. C 4. B 5. C 6. C