WE SHOULD USE COAL, OIL, AND GAS ……….A. AS MUCH AS POSSIBLE B. CAR...

27. - BAI TAP TRAC NGHIEM ANH VAN 10
BAI TAP TRAC NGHIEM ANH VAN 10

27. We should use coal, oil, and gas ……….

A. as much as possible B. carelessly

C. as economically as possible D. all are in correct