THEY BURRIED THOUSANDS OF FISH ……… BY POISONOUS CHEMICALS FROM A NE...

7/ - GIÁN ÁN KIEM TRA HOC 1 TIET
GIÁN ÁN KIEM TRA HOC 1 TIET
7/ They burried thousands of fish ……… by poisonous chemicals from a nearby factory.a. to kill b. killing c. which kill d. killed