________________ he will come back this week or next week is not decided .
In the future, care for the environment will become very important as earth’s natural resources _____.
If you ask many different questions, you will ____ all the information you need to know.
In the Olympic Games, only athletes who have reached the agreed standard for their event will be ______ as competitors.
Our bodies are strengthened by taking exercise._______ our minds are developed by learning.
It is a mainly dry country with only a few coastal areas that have ____ rainfall to support a large population.