题目

补全对话：选择方框中的句子补全对话，有两项多余。 A: Where does your mother work? B: 1.       A: 2.       B: Usually she rides a bike. Sometimes she takes a bus. A: 3.        B: About 15 minutes. A: What about the bus? B: Wow! That’s a long time. 4.       A: 5.       B: Because there are too many cars and buses on the road（路）. A: Oh, I see. A.How long does it take her to ride a bike? B. How does she go to work? C. Why do you take a bus? D. Why is it so? E. It takes her about 25 minutes. F. At the radio station. G. I ride a bik15．下列属于人类特有的条件反射的是（　　）A．看到梅子时会分泌唾液B．吃梅子时会分泌唾液C．嗅到梅子气味时会分泌唾液D．谈论梅子时会分泌唾液