1. 我一直在修我的自行车。

2. 他设计太阳能赛车很长时间了。

3. 你参加过几场比赛？

4. 她最近和老板相处不太和睦。

5. 从上次你见她以来，她一直在做什么？

Possible answers:

1. I've been repairing my car.

2. He has been designing solar racing car for a long time.

3. How many races have you taken part in?

4. She hasn't got on well with her boss recently.

5. What has she been doing since you last saw her?

Activity two: Check exercises

T: Now show me your homework to see if you have grasped the usage of the two tenses.

Let students either speak the answers out or show them on the screen.

T: Any points you are not sure about?

Ss: No. They are easy to work out.

StepⅡ Pre-listening

Activity one: Mini discussion

T: As you know, with the development of economics, people are living a better life. More and more people like traveling. But why do people like to spend money on traveling?

Let students think over a little bit.

S1: I think people travel to meet new friends, to try new kinds of food, to experience life in other parts of the world, or simply to get away from cold weather.

T: Sounds great. So how do they travel?

S2: There are many means of transportation, such as by train, by sea, by plane or even in their private cars.

T: Then have you ever been on an airplane?

S3: Not yet, but I am sure I will in the future.