| A.warm | B.hot | C.cool | D.cold |
| A.They tried to stop them moving. |
| B.They tried to melt them. |
| C.They tried to move behind them. |
| D.They tried to stay ahead of them. |
| A.mountains and valleys | B.the sun,the moon and the earth |
| C.cities and countries | D.seas,lakes and rivers |
| A.the freezing ice |
| B.the weather of the year |
| C.the moving of the ice blocks |
| D.a plant or an animal |
| A.a; b | B.b; d | C.c; d | D.a; c |