Charles was alone athome，with _____ lookingafter him.

It was with the help of the local guide ________ the mountain climber was rescued.(2013·重庆，27)

Hank lives in the southern part of London,_________is the capital of England.

_____ of the water _____ polluted. We must try to protect our environment.

________, you will get used to the life here and have your understanding of life. [ ]