题目内容
1.The man spent much of his childhood_________(observe) birds in the wild.
2.My friend was down with the flu,and_______(因此)couldn't come to the party.
3.He w_______to her so that no one else could hear.
4.I'm full up.I couldn't eat another m________.
5.There are many______________(方法)to improving students's writing ability.
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