根据句意和所给首字母提示完成句子。

1. The increasing population may be the greatest c________ of the world today.

2. Will it b________  you if I turn the television on?

3. He is an e________ boy,  he enjoys sports.

4. Peter is c________ of winning the post as the assistant to the managing director.

5. The old woman felt n________ as she tried to cross the busy road.

1.______ 2.______ 3.______ 4.______ 5.______