动脑筋，看看下列每种小动物共有多少只，写出来。1. 
15 + 20 = dogs 2. 
11 + 9 = 3. 
23 + 24 = 4. 
38 + 42 = 5. 
47 + 25 =
试题答案
1. thirty-five 2. twenty chickens 3. forty-seven fish 4. eighty mice 5. seventy-two sheep