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