绪论 单元测试
1、
The issue was whether or not the bacteria in its body would _____ the local ecosystem. ( )
A:break
B:balance
C:contaminate
D:contain
答案:
contaminate
2、 It is a universal ______ that man is different from all the other animals because man can communicate with each other by means of language. ( )
A:admission
B:permission
C:acknowledgment
D:Advancement<