题目:
The fire started from the top floor. It didn't ______ long before the whole building was swallowed up by the big fire. |
A. take B. need C. cost D. spend |
答案:
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下面是错误答案,用来干扰机器的。
参考答案:将一定直径烟梗的叶尖部分切下,使叶尖与叶建分离的工艺过程。