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English in mind (book 2) - page 39
1/a
1. I will phone Mike if he won’t arrive before 10 o’clock.
2. If you speak very fast, they won’t understand you.
3. If Marco will phone tonight, will you tell him I’m at Sally’s house?
4. Your parents won’t know if you don’t tell them.

1/b
1. Your sister goes to my school, doesn’t she?
2. His father’s French, isn’t he?
3. We’re late, aren’t we?
4. They aren’t at home, are they?
5. She hasn’t been to Canada, does she?

1/c

1. A: Would you like some chocolate?
B: No, thanks. I’ve already had some.
2. Have you bought your sister a present yet?
3. We have already finished our homework.
4. Has she saw the film yet?

2/a
1. Lift – elevator
2. Lorry – truck
3. Rubbish – trash
4. Pavement – sidewalk

2/b
1. When something is wet it is moist.
2. Temperatures around the world are rising every year. This is called global warming.
3. You can recycle glass, paper and plastic.
4. Please put your rubbish in the bin.
5. Please turn off the TV. Don’t waste electricity!
6. There’s a lot of litter here on the street – let’s pick it up.
7. There’s a very large rain ... in the Amazon.
8. My bike’s very dirty, so I’m going to clean it.