II.  Choose the correct answer to complete each of the sentences.

16. Stop eating fast food, _____you will be fatter.

A. or                        B. so                        C. but                   D. and

17. Martha keeps coughing_____,she needs to meet the doctor.

A. so                        B. but                      C. or                     D. and

18. When you return_____ dusty area, remember to use eye-drops.

A. on                       B. to                        C. from                D. upon

19. Lan likes eating junk food_____,her sister likes vegetable and fish.

A. or                        B. and                      C. so                     D. but

20. Louise, you should drink_____ water, your skin looks bad.

A. less                      B. more                    C. most                D. least