Bob would have helped us yesterday, but he

Bob would have helped us yesterday, but heA.was busy B.is busy C.had been busy D

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The girl had hardly rung the bell__________ the door was op

The girl had hardly rung the bell__________ the door was opened suddenly, and

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What is still not clear about Cremona violins?

What is still not clear about Cremona violins?A.The shape. B.The wood. C.The siz

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