A.Human beings | B.Animals |
C.Plants | D.People in other planets |
A.two | B.three |
C.four | D.five |
A.Yes, it is. | B.No, it isn’t. |
C.Yes, there is. | D.No, there isn’t. |
A.Because of water pollution, many rivers and lakes are now dead. |
B.We must stop the factories from pouring waste water into the rivers and lakes. |
C.Most of things that we have done are good for our planet. |
D.Water pollution is very serious nowadays. |
A.Though Mexico city is always covered by thick brown clouds, it’s still a beautiful sunny capital. |
B.Air pollution can make people sick. |
C.Now fewer farmers use chemicals in the fields. |
D.Factories, cars, trucks and buses are the main cause of soil pollution |