That’s an important event________American history．
| A．in |
| B．at |
| C．on |
| D．for |
Do you know how to ____ ice into water?
| A．change | B．dry | C．make | D．produce |
Let’s try our best to ____ paper to save the trees.
| A．use | B．make | C．recycle | D．waste |
We tried to stop the flames from spreading, but we knew it was ____.
| A．unusual | B．enjoyable | C．hopeful | D．hopeless |
My parents go to work by bike ____ by bus.
| A．instead | B．instead of | C．but | D．and |
This is ____ for the table.
| A．a clothes | B．a cloth | C．clothes | D．cloth |