题目内容

()是一定时期内人们有支付能力并愿意购买某种物品的欲望。

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Which flight do you prefer, () (first class) or the business?

I didn't get home until it got dark last night and all my family () (be) worried about me.

() (get up early) in the cold winter mornings is not easy.

I think it hard for them () (动词 win 的合适形式) (觉得他们很难赢)the game.

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