World Wildlife Fund (WWF)'s goal is to save the world's environment. The organization was set up ___21__September 11，1961. In the beginning, WWF worked __22__ the world's wildlife. Now, it works to save Earth__23___ its environment. WWF has many tasks. One is to stop air pollution. Pollution from industry(工业)  and cars is _24_ to our environment. Each year, more and more trees are cut down __25__WWF tries to protect Earth's forests．Also people use more land, more and more animals are __26__ their homes and many die. WWF can buy important areas to __27__ the land from disappearing because of human development. WWF has completed many projects. In China, WWF works to save pandas from  extinction（灭绝）． ___28__South America，it works to save the Amazon Rainforest.  Volunteers and donations help WWF complete its work. WWF's work is __29__to our environment, and is also important for people to help them __30__ time and money. 小题1: A．in B．at C．on D．／ 小题2: A．save B．to save C．saving D．saved 小题3: A．and B．but C．or D．so 小题4: A．harmed B．harmless C．harm D．harmful 小题5: A．because B．because of C．so D．but 小题6: A．lose B．losing C．lost D．loses 小题7: A．give B．provide C．prevent D．protect 小题8: A．At B．On C．In D．To 小题9: A．hard B．important C．easy D．useful 小题10: A．on B．about C．at D．with