Class, of all the things we eat and drink, water is the   1   important．Not   2   people understand this but it is quite true．The human body can go   3   food for a long time, but two   ___4   three days without water usually make people   5 ．Many people do not understand how   6   water the human body needs   7   well and many people do not drink   8  , especially in hot weather．Most people drink when they are thirsty but often need more water, especially when they take exercises．

A man's body is 65 to 70 percent water．If we do not have   9   water, we feel   10  and may become ill．Do you know what the best drink is?

1．A．most                   B．much               C．least                       D．more

2．A．few                    B．many              C．lot of                D．much

3．A．with                    B．on                   C．without             D．by

4．A．and                    B．or                  C．but                 D．of

5．A．died                  B．to die                 C．dying                D．die

6．A．much                  B．little                   C．many                     D．can

7．A．work                  B．to work              C．working            D．works

8．A．enough                 B．fast                  C．more               D．full

9．A．some                  B．a little                  C．all                  D．enough

10．A．fine                   B．tired                 C．happy              D．well