3. We spent a day in the country and picked a lot of flowers. Our car was full of flowers inside! On the way home we had to stop at traffic lights, and there my wife saw the bookshelf. It stood outside a furniture (家具)shop. "Buy it," she said at once. "We＇ll carry it home on the roof-rack (车顶架) . I＇ve always wanted one like that. "What could I do? Ten minutes later I was twenty dollars poorer, and the bookshelf was tied on to the roof-rack. It was tall and narrow, quite heavy too.As it was getting darker, I drove slowly. Other drivers seemed more polite than usual that evening. The police even stopped traffic to let us through. Carrying furniture was a good idea. After a time my wife said, "There＇s a long line of cars behind. Why don＇t they overtake (超车) ? "Just at that time a police car did overtake. The two officers (警官)inside looked at us seriously when they went past . But then, with a kind smile they asked us to follow their car through the busy traffic. The police car stopped at our village church (教堂) . One of the offices came to me." Right, sir," he said. "Do you need any more help now?" I didn＇t quite understand. "Thanks, officer," I said. "You＇ve been very kind. I lived just down the road."He was looking at our things: first at the flowers, then at the bookshelf. "Well, Well," he said and laughed. "It＇s a bookshelf you＇ve got there! We thought it was something else." My wife began to laugh. Suddenly I understood why the police drove here. I smiled at the officer. "Yes, it＇s a bookshelf, but thanks again." I drove home as fast as I could. Why were the police and other drivers so kind to the writer?

7.trade

6.enjoy

5.invite

4.professor

3.business card

2.introduce

1.greet

25. on stand-by | riding | taking | turning off | are through with Save Electricity Whenever we use electricity, we put greenhouse gases into the air. By ____1____ lights, the television, and the computer when you ____2____ them, you can help a lot. If you＇re leaving your computer for a while, put it ____3___. You＇ll be able to restart it quickly, and it＇ll take less energy than shutting it down and then restarting it. Bike, Bus, and Walk You can save energy by sometimes ___4____ the bus, ___5____ a bike, or simply walking.

24. be smart about | trap | carpooling | do our part | make a difference Climate change may be a big problem, but there are many little things we can do to ____1____. If we try, most of us can ____2____ to reduce the amount of greenhouse gases that we put into the atmosphere. Many greenhouse gases come from things we do every day. As we have learned, these greenhouse gases ____3___ energy in the atmosphere and make the Earth warmer.Driving a car or using electricity is not wrong. We just have to ___4____ it. Some people use less energy by ___5____. For example, four people can ride together in one car instead of driving four cars to work. Why not try to do something to help make the planet a better place?

23. around | punctual | avoid | new | show up If you＇re ____1____ to working in the United States, doing business with the U.S., or working for an American company overseas, here are a few tips for your everyday behavior ____2____ appointments and punctuality. They are sure to help you get ahead with your American colleagues: Schedule meetings and appointments in advance — a few days, a week, even a month in advance. Always make appointments for in-person meetings. Don＇t just ____3___ and expect people to make time to talk with you. If you think you＇re going to be more than a few minutes late for any appointment, call and let the other party know you＇re running late. Plan your own time so that you can be ___4____ for appointments you have made. ___5____ changing plans at the last minute.