The factory used 65 percent of the raw materials, the rest of which ________ saved for other purposes.
If better use is _______ your spare time, you will have a more brilliant future.
The fire made _____ difficult to rescue the people trapped under the ruins in the earthquake.
The world will be different, and we will have to be prepared to ________ the change.
You were silly __________ your car, otherwise it wouldn’t have been stolen.
The health organization is ___________ its tenth anniversary this year.