题目内容
The president was _____ a speech to senators _____ a group of armed young people burst into the hall
A. giving; as B. making; when C. delivering; while D. speaking; when
B
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题目内容
The president was _____ a speech to senators _____ a group of armed young people burst into the hall
A. giving; as B. making; when C. delivering; while D. speaking; when
B