There was no sign they had died from diseases such as bird flu - the main worry
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There was no sign _______ they had died from diseasessuch as bird flu - the main worry in such cases. Among the theories was _______a truck had collided（碰撞）with the crowd.
A．/; that B．that; that C．that; which D．that; /
试题答案
【答案】
B
【解析】
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