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举一反三
【单选题】Ladies and gentlemen, welcome to Dalian, a famous summer resort ( 避暑胜地 ) and one of the best tourist cities in China. With clear sky, green mountains, blue seas, fine beaches, clean streets and lovely...
A.
comes in the best season.
B.
is here to join more tourists
C.
may not stand the heat here.
D.
is traveling back home.
【多选题】环境问题经历了哪几个阶段（）？A. 环境问题发展萌芽阶段 B.环境问题恶化阶段 C.第一次环境问题高潮阶段 D. 第二次环境问题高潮阶段
A.
A
B.
B
C.
C
D.
D