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举一反三
【单选题】Happy Earth DayThe Good News Here’s the good news: our air is cleaner, our lakes are purer, our forests are healthier, endangered species are recovering, toxic emissions are down, and acid rain has di...
A.
grass-roots organizations
B.
individual activism
C.
environmentalists
D.
environmental regulation
【单选题】Visitors exploring one of Britain’s many historic buildings might expect to see beautiful objects and learn more about history. What they won’t expect is to meet one of the former residents, and to be...
A.
taking care of historic buildings
B.
keeping historic sites in good condition
C.
organizing many living history events
D.
having all visitors dressed in costumes