SAVING ENERGY PRACTICE TEST 1I. CHOOSE THE WORD OR PHRASE THAT...

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

6. Dioxins are dangerous chemicals

____________

they can cause cancer and birth defects.

a. but

b. then

c. because

d. and