2. 外语
  3. They will not decide their attitude until they______what the speaker has to say.

They will not decide their attitude until they______what the speaker has to say.

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问题 They will not decide their attitude until they______what the speaker has to say.
选项 A、have heard
B、will hear
C、would hear
D、had heard
答案A
解析 这是一道语法题，考点是动词时态。“听到说话人要讲的内容”要发生在“决定自己的态度”之前，因此要用完成时have heard。因此A为正确答案。
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