Of all the things we eat and drink，water is the  1 important.The human body can go 2    food for a long time，but two  3 three days without water could make people  4 .
A lot of people don’t understand how  5 water the human body needs  6 well and many people don’t drink enough，esecially in  7 weather. Most people drink  8 they are thirsty but in fact they need more water，expecially when they take  9 .
A man’s body is 65 to 75 percent of  10 . If we don’t have enough water. We fell tired and may become ill.
1.A.more  B.most  C.less  D.least
2.A.with  B.on  C.without  D.by
3.A.or  B.and  C.of  D.but
4.A.died  B.to die  C.dies  D.die
5.A.many  B.little  C.few  D.much
6.A.work  B.working  C.to work  D.works
7.A.hot  B.cold  C.cool  D.warm
8.A.so  B.that  C.when  D.since
9.A.fun  B.exercise  C.exercises  D.work
10.A.blood  B.water  C.air  D.food