摘要：4．After visiting China.most of the foreign friends said they would never forget the time they had spent in China. A．that B．what C．when D．at which 解析:选A.考查定语从句.that they had spent in China是定语从句.修饰先行词the time.关系代词that在从句中作spent的宾语.可以省略.

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