Selecting Conjunctions?

1. I would like to go to the meeting. I have to work tonight.

Ans: I would like to go the meeting, but I have to work tonight.

2. Taking the bus is chapter than driving. It conserves energy.

Taking the bus is ?cheaper? than driving, and it conserves energy.

3. The skier broke his leg. He couldn’t complete in the Olympics.

The skier broke his leg, so he couldn't compete in the Olympics.

4. Students may not smoke in class. They may note at in class.(use nor)

Students may not smoke in class, nor may they eat in class.

5. Zoo animals must not be fed by visitors. Some snack foods are harmful to their health.

Zoo animals must not be fed by visitors because some snack foods are harmful to their health.

6. The family next-door had just moved in. The neighbors had a welcoming party for them.

The family next door had just moved in, so the neighbours had a welcoming party for them.

7. Butter is very expensive. Most people buy margarine.

Butter is very expensive, so most people buy margarine.

8. I brought a large car two years ago. Now I wish I had a small one.

I bought a large car two years ago, but now I wish I had a small one.

9. Robert is a lazy student. He misses a lot of classes.

Robert is a lazy student because* he misses a lot of classes

*not quite sure whether this should be so... or even and... none sound quite right

10. Would you like to go in a movie? Would you rather go ice skating?

Would you like to go to a movie, or would you rather go ice skating?