2. 外语
  3. They promised to pay their first order last month but until yesterday they________any money.

They promised to pay their first order last month but until yesterday they________any money.

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问题 They promised to pay their first order last month but until yesterday they________any money.
选项 A、would not pay
B、do not pay
C、have not paid
D、had not paid
答案D
解析 本题考查过去完成时的用法。过去完成时表示在过去某一时间或动作以前已经发生或完成了的动作，否定式则相反。题中四个选项均为否定式，题干的时间点为“昨天”，即表示此动作在过去的某一时间还未完成，符合过去完成时的定义，由此确定本题答案为D)。
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