题目内容

People are concerned about the environment issue because air and water pollution not only affects everyone’s health but also makes it difficult for businesses to ______.

A. profit
B. overcome
C. win
D. purchase

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Though many things have been changed culturally, there is a commitment and sense of responsibility that have not been _____ in today’s society.

A. held
B. discarded
C. validated
D. expressed

A strong police force has been placed between the two _____ groups in village to prevent fighting and killing.

A. proponent
B. joint
C. friendly
D. rival

What does prefix ir- mean?

A. under
B. together
C. not
D. before

What’s the function of Para.4?

A. Introduction
B. Summary
C. Transition
D. Conclusion