题目

在一个完整的电路中，小灯泡不亮，说明灯泡中没有通过。 答案：【1】电流 When you are in England, you must be more careful in the street because the traffic drives on the left. Before you cross the street, you must look to the right first and then left. In the morning and in the evening, when people go to or come from work, the streets are very busy. Traffic is the most dangerous then. When you go by bus in England, you have to be careful, too. Always remember the traffic moves on the left. So you must be more careful, have a look first or you will go wrong. In many English cities, there are big buses with two floors. You can sit on the second floor. From there you can see the city very well. 1. In England the traffic drives______. A. on the right     B. in the middle    C. on the left    D. in the front 2. When you cross the street, you must look to _______. A. the left first   B. the right first   C. the front first   D. the back first 3. In the morning and in the evening the streets become busy because________. A. the people go to work           B. the people come from work C. the weather is fine             D. both A and B 4. The big buses with two floors in the England are _______in China. A. 单层公共汽车  B. 双层公共汽车   C. 地铁    D. 长途公共汽车