摘要：10．Distinguished guests and friends.welcome to our school. the ceremony of the 50th Anniversary this morning are our alumnifrom home and abroad. A．Attend B．To attend C．Attending D．Having attended 解析:分析句子结构可知第二句是一个倒装句.把它还原成正常语序应该是:Our alumni from home and abroad are the ceremony of the 50th Anniversary this morning.所以此题应该用attending作谓语动词的一部分. 答案:C

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