How is Mary？
A. She is in.
B. She feels happy.
C. She is sad.
A．payingB．offeringC．givingD．leaving
A. paying
B. offering
C. giving
D. leaving
生态系统演替的对策，基本上与生物圈长期进化发展的对策是相同的。（）
A. 正确
B. 错误
A．gatherB．takeC．collectD．check
A. gather
B. take
C. collect
D. check
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