These natural disasters have warned us that everyone should start to protect the_________ immediately.

Before graduation, we had got a lot of practical _____ by doing a part-time job in the factory and it was really ______ for all of us.

I was awfully tired when I got home from work, but a half-hour nap ______ me.

Standing on the top of the Oriental Pearl Tower, you will get a wonderful _______ of Shanghai city.

Lucy had an unusual ______ for learning languages when she was a baby.