Complete the sentences with and, so, but, because, although, or

1. He was late for school____________there was a traffic jam

2. Mary likes singing___________she cannot sing well

3. I have a lot of homework to do, _____________I can't go to the cinema with you

4. Nadia doesn't like to drive,_____________-she takes the bus everywhere

5. To get from Ho Chi Minh City to Ha Noi, you can fly_________-you can travel by train

Bob: (1)__________________________________

David: Mostly for one hour. (2)_________________

Bob: (3)__________________________________

David: I watch it for information and entertainment

Bob: (4)__________________________________

David: I like to watch sports channel ESPN

Bob: (5)__________________________________

David: I also watch Discovery, History and some news channels

Bob: (6)__________________________________

David: Most of the cartoon movies refresh our mind

Nếu nội dung ảnh trên?

Tính:

M= \(\left(\frac{1}{2}-1\right).\left(\frac{1}{3}-1\right).\left(\frac{1}{4}-1\right)...\left(\frac{1}{2011}-1\right)\)