C B

Sugar is not an unhealthy food because we need it to live. (HEALTH)

 She likes watching television.

 If no one is concerned, our life won't be...

 If you turn off your computer when you don't use, you will save electricity.

 If we didn't use the car all the time, we wouldn't make the air dirty.

 Are there twenty-five students in your class?

We might be able to go to the moon for our summer holidays in 2050.

 Do you and your friends go to school on foot every day?

 How about going to the beach and having a good time there.

 I have never talked to her before.

 It takes me two hours a day to do my home work.

Tom is the laziest in my class.

They have driven since they were 18 years old.

 It is the first time we have ever eaten in such an expensive restaurant.

how many bikes does you father have?

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