祖母比孙女大54岁，祖母和孙女的年龄和是60岁，那么几年之后祖母的年龄是孙女年龄的7倍 ()
A．6B．5C．7D．4
参考答案：A
根据句意及首字母提示填空。
1. When you are going across the road, you shouldn't r____.
2. You may call the police when you are in t____.
3. In China when you see the yellow lights, please s____ down.
4. He always wants to get more money without working. He must be c____.
5. She a____ answering my question because she doesn't know how to answer it.
重心
