题目内容:
Thereadercanconcludethat______.
A.countriesoftheworldwillworktogetheronpollutionproblems B.byproductsfromwastesleadtoamoreprosperousmarketplace
C.scienceismakinggreatprogressonincreasingwatersupplies
D.someindustriesarenowmakingeconomicuseofwastes
参考答案:
答案解析: