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The captain wants to know what( ) the spaceship?A happen to B happened to

题目详情
The captain wants to know what( ) the spaceship?A happen to B happened to
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答案和解析
B已经发生了的事,主句一般现在时宾语从句可以根据需要选择时态,宾语从句是过去的事,应用一般过去时