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—An explosion（爆炸）happened at Yancheng chemical plant ______ the afternoon of March 21, 2019. More th...
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—An explosion（爆炸）happened at Yancheng chemical plant ______ the afternoon of March 21, 2019. More than 70 people died ____________ the explosion.
—I'm sorry to hear that. We should always remember: Safety first.
A.on; of B.on; from C.in; for D.in; in
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