在寒冷环境中，机体主要依靠下列哪种方式来增加产热量 ( )A．肝脏代谢加强 B．

___ of years ago, life was much harder than it is today. People didn’t have modern machines. There was no modern medicine,__.
Life today has brought new_____. One of the biggest is pollution of our drinking water. __ pollution makes us talk louder and become angry more easily. Air pollution is the most serious kind of pollution. It’s bad to all living things in the world. Cars, planes and factories all pollute our air every day. Sometimes the polluted air is so thick that it is like a quilt_____ a city. This kind of quilt is called smog.
Many countries are making rules to fight pollution. Factories must now clean their water before it is thrown away, and they mustn’t blow dirty____ into the air.
We need to do many other things. We can put waste things in the dustbin and not throw it on the ground. We can go to work ___ or with our friends in ____ car. If there are fewer people driving, there will be ___ pollution.
Rules are not ___ .Every person must help to fight pollution.

小题1:	A．Hundred B．One hundred C．Hundreds D．Two hundreds

小题2:	A．also B．as well C．too D．either

小题3:	A．problems B．questions C．styles D．inventions

小题4:	A．Noise B．Dirty paper C．Litters D．Water

小题5:	A．around B．on C．through D．over

小题6:	A．noise B．smoke C．water D．wind

小题7:	A．by foot B．on bus C．by bus D．by the bus

小题8:	A．same B．the same C．a same D．different

小题9:	A．fewer B．less C．a few D．more

小题10:

A．much B．many C．good D．enough