用所给词的适当形式填空:I spent ten minutes___ (answer)the teacher's questions.

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用所给词的适当形式填空:I spent ten minutes___ (answer)the teacher's questions.
用所给词的适当形式填空:I spent ten minutes___ (answer)the teacher's questions.

用所给词的适当形式填空:I spent ten minutes___ (answer)the teacher's questions.
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spend接动词ing形式

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