2. 外语
  3. Only in recent years______begun to realize the importance of environmental protection.

Only in recent years______begun to realize the importance of environmental protection.

admin2010-02-22  20
问题 Only in recent years______begun to realize the importance of environmental protection.
选项 A、people have
B、have people
C、that people have
D、since have people
答案B
解析
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