I was on the highway when this car went past followed by a police car. They ______ at least 150 km an hour.
| A．should have been doing | B．must have been doing |
| C．could have done | D．would have done |
15. Justice has long ____ . (法网恢恢) Whoever breaks law will be punished by the people after all.
| A．shoulders | B．hands | C．fingers | D．Arms |
16. As a work of ____ , we can't judge its value by appearances.
| A．art | B．arts | C．the art | D．the arts |
17. With the help of our class, Little Mike made such great progress in Chinese that he can write a 200-character ____ .
| A．compositions | B．papers | C．essays | D．Article |
18. Deng Xiaoping was our general designer of reform and opening up to the outside world(改革开放). After he passed away, his ____were scattered over the sea.
| A．ashes | B．ash | C．dusts | D．Dust |
19. Russia is a country which extends across _____ .
| A．Asia | B．Europe | C．Asia and Europe | D．Africa |