Gunpowder is generally believed __________ in ancient China.
| A．to have invented | B．being invented | C．to have been invented | D．having invented |
If you don' t know a word, you can ________ the word in a dictionary.
| A．look up | B．look down | C．look over | D．look out |
Many girls like __________ skirts in summer.
| A．wearing | B．dressing | C．in | D．putting on |
He ________ living in the country to the city.
| A．likes | B．prefers | C．enjoys | D．loves |
The students put down their pens when the teacher_____ them to stop writing.
| A．said | B．spoke | C．told | D．talked |
Let the children go away. They're making to much _______ here.
| A．noise | B．voice | C．sounds | D．songs |