Tickets to the orchestra's______were sold out in one day.
A.perform
B.performer
C.performing
D.performance

A.A.perform
B.performer
C.performing

【参考答案】

D
解析：空格前面的所有格orchestra's是解决问题的线索。所有格的后面必须是名词，因此正确答案就在(B)......

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