Question 1. Choose the best answer (A,B,C or D) to complete each of the following sentences.
1. A. effective
2. B. bill
3. D. dripping
4. A. necessities
5. C. However
6. A. because
7. C. or
8. A. waste
9. C. accounts
10. A. should use
Question 2. Choose the underlined part among A,B,C or D that needs correcting.
11. A. shouldn't
12. C. on
13. B. switching
14. C. about
15. B. to buy
