Choose the best answer to complete the sentences

2. Don't read in bed, _______ you'll harm your eyes.

A. or     B. and C. but D. so

3. It's good to____ blood because you can save people's lives.

A. help     B. use     C. donate     D. collect

4. They_____ the beach one week ago.

A. cleaned     B. clean     C. cleaning     D. to clean

5. My family has decided to use _________ electricity by using more solar energy instead.

A. more     B. less     C. much     D. fewer

6. I ............... playing board games interesting because I can play them with my friends.

A. find     B. think     C. say     D. tell

7. -“Would you like me to turn off your computer?

- “ ______________. I’ll do it myself”