题目内容
Some passengers were walking through one of the big halls at Paris' Charles De Gaulle Airport ________ the whole roof(屋顶) fell down.
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A.while
B.as soon as
C.when
D.after
答案:C
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题目内容
Some passengers were walking through one of the big halls at Paris' Charles De Gaulle Airport ________ the whole roof(屋顶) fell down.
[ ]