EXERCISE 16

　　From the very beginning,water has furnished man with a source of food and a highway to travel.The first civilizations arose __1_ water was dominant element in the environment,a challenge__2_ man's ingenuity.The Egyptians invented the 365-day calendar __3_ the Nile's annual flooding.The Babylonians,_4__ were among the most famous law-makers in ancient times,invented laws_5__ water usage.Water inspired the Chinese to build a 1000__6_ canal,a complex system __7_,after 2500 years,remains partically __8_ and still commands the astonishment of engineers.But _9__ never found complete solutions_10__ their water problem .The Yellow River is also known _11__ "China's sorrow".It is so unpredictable and dangerous __12_ in a single flood it has caused a million _13__.Floods slowed the great _14__ of the Indus River Valleys,and innumerable damage ruined _15__ of its land.Today,water dominates man _16__ it always has done.Its presence continues to __17_ the location of his homes and cities;its violent variability can _18__ man or his herds or his crops;its routes links him __19_ his fellows;its immense value may __20_ to already dangerous political conflicts.There are many examples of this in our own time.

　　1）    A where         B the place        C when      D in the place
　　2）    A with          B as              C to         D on
　　3）    A in regard to    B in response to     C in case     D in spite of
　　4）    A they          B /                C that       D who
　　5）    A regulates      B regulate          C regulated   D regulating
　　6）    A miles         B mile            C mile's       D miles'
　　7）    A who          B in which         C which      D by which
　　8）    A in use        B for use           C by use      D on use
　　9）   A ancient      B the ancients        C ancients     D ancients people
　　10）   A for          B of               C to          D on
　　11）   A for          B by               C to          D as
　　12）   A that         B which            C because     D as
　　13）   A people      B deaths            C damages     D ruins
　　14）   A influence    B effect            C society       D civilization
　　15）   A many       B lot               C much        D a lots
　　16）   A for         B as               C because       D whereas
　　17）   A effect       B control           C lead          D influence
　　18）   A cause       B violate           C kill           D damage
　　19）   A by          B on              C at            D to
　　20）   A increase     B add             C solve          D intensify

　　答案：

　　1——5ACBDD
　　6——10DCABC
　　11——15DABDC
　　16——20BDCDB