Question

 从方框中选出合适的短语并用其适当形式填空。

cut down，come into being，die out， blow away, wash away

1. People destroyed the living conditions of animals. So some animals on the earth are      completely.

2. Trees can stop the wind from       the earth.

3. Heavy rain will       the soil soon if there are no trees.

4. A new rule will soon       to solve the problem.

5. We should plant more trees after we       some      

Answer 1

  1. dying out 2. blowing away 3. wash away 4. come into being 5. cut;down