As civilization______, more and more people have realized the importance of preserving rare animals from extinction.

Living in a highly     society，you definitely have to arm yourself with modern technology and skills．

With modern equipment，many mysteries have ____ to light in recent years.

4．If people feel hopeless, they don’t bother to _____the skills they need to succeed.

He was in great need of money, so he _____ $5, 000 for his car.