The message is very important , so it is supposed ______ as soon as possible .
6. As there is less and less coal and oil, scientists are exploring new ways of making use ofenergy, such as sunlight, wind and water for power and fuel.
5. In our class, when the bell rang and the taacher closed his book, it was a or everyone to stand up.
4. Hiking by oneself can be fun and good for health. It may also be good forbuilding.
3. Some parents are just too protective. They want to ______ their kids from every kind of danger, real or imagined.
2. During the war there was a serious lack of food. It was not unusual that even the wealthy families had to ______bread for days.