每日的治疗费用为A．总金额数/总DDD值 B．总购入量/总DDD值 C．总购入量/D

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