2. 外语
  3. Migratory birds fly in formation to______. The word "each" in the 5th sentence of the second paragraph refers to______.

Migratory birds fly in formation to______. The word "each" in the 5th sentence of the second paragraph refers to______.

admin2009-06-24  16
问题 Migratory birds fly in formation to______.
The word "each" in the 5th sentence of the second paragraph refers to______.
选项 A、formation.
B、study.
C、factor.
D、explanation.
答案D
解析
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