There will be thousands watching it.
将有数千人观看比赛。
A I also like the big, dramatic events at the Olympics.
A 我也喜欢奥运会上的大型的、壮观的比赛项目。
B So do I. I love the marathon. It’s one of the biggest events. It’s a classic race.
B 我也是。我喜欢马拉松。这是大型项目之一。很古典的比赛项目。
A It’s such a tough race! Forty kilometres is a long way.
A 它是如此艰苦的比赛！40公里可是一个很长的路程。
B I know. I hope it isn’t too hot when they run the marathon. It’s better when the weather is cooler.
B 我知道。我希望举行马拉松比赛时天气不要太热。天气凉爽一些会更好。
A I agree. And the race goes all through the streets of Beijing. There will be thousands watching it throughout the city.
A 我赞成。马拉松比赛将穿过北京的街道。到时候全城将有数千人观看。

Notes注释
1.There are various words you can use to describe something like the Olympics, or events such as the marathon, eg: The Olympics are exciting / The Olympics are exciting. eg: The marathon is a tough race / The marathon is a tough race.
有很多的词汇可以用来描述像奥运会这样的事件，或者像马拉松这样的比赛项目。例如：The Olympics are exciting /奥运比赛将激动人心。The marathon is a tough race /马拉松是一项艰苦的比赛。
2.Remember the ways in which you can describe weather conditions: I hope it isn’t too hot / I hope it isn’t too hot; It’s better when it’s cooler / It’s better when it’s cooler.
记住描述天气的用语：I hope it isn’t too hot / 我希望天气别太炎热。It’s better when it’s cooler /天气凉爽会好一些。

Key phrases and sentences
I also like the big, dramatic events at the Olympics.
So do I. I love the marathon. It’s one of
the biggest events. It’s a classic race.
It’s such a tough race! 
Forty kilometres is a long way.
I know. I hope it isn’t too hot when they
run the marathon. 
It’s better when the weather is cooler.
I agree. And the race goes all through
the streets of Beijing. 
There will be thousands watching it
throughout the city.

我也喜欢奥运会上的大型的、壮观的比赛项目。
我也是。我喜欢马拉松。这是大型项目之一。很古典的比赛项目。
它是如此艰苦的比赛！40公里可是一个很长的路程。
我知道。我希望举行马拉松比赛时天气不要太热。
天气凉爽一些会更好。
我赞成。马拉松比赛将穿过北京的街道。到时候全城将有数千人观看。