THE ENVIRONMENT PRACTICE TEST 1I. CHOOSE THE WORD OR PHRASE THA...

1. - 200 CAU TRAC NGHIEM KQ ANH 9 -BAI 6-7
200 CAU TRAC NGHIEM KQ ANH 9 -BAI 6-7

1. What will happen if all the pollution goes ______? .

a. on

b. to

c. with

d. off