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No sooner had the bell rung . [ ] A.when the class began B.while the class was b

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No sooner had the bell rung . [ ] A.when the class began B.while the class was b

No sooner had the bell rung ________.

[]

A.when the class began

B.while the class was beginning

C.then the class was going to being

D.than the class began

试题答案

答案:D