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

49. - 200 CAU TRAC NGHIEM KQ ANH 9 -BAI 6-7
200 CAU TRAC NGHIEM KQ ANH 9 -BAI 6-7

49. Everybody knows that cars emit dangerous gases_____________.

a. so they do not travel by cars

b. so they prefer traveling by bicycle

c. but they still prefer traveling by car

d. and they enjoy traveling on foot