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The temperature ______ below zero last night because the water is frozen all ove
The temperature ______ below zero last night because the water is frozen all ove
游客
2023-11-21
42
管理
问题
The temperature ______ below zero last night because the water is frozen all over.
选项
A、had dropped
B、must have dropped
C、would have dropped
D、must drop
答案
B
解析
“must+现在完成时”可以表示对过去已经发生的事件的推测,符合本题的题意。“would+现在完成时”是虚拟语气的用法之一,用于表示过去可能发生却没有发生的事件。
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