--- Tom, did Mr. Li join you in your discussion?
--- No, he _____, but he happened to have fallen ill.A.would like toB.willC.was to haveD.was going to join
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C解析本题考查时态。从上下文来看,询问的是过去发生的事情,因此先排除B。根据句意“他本来要来的,但碰巧病了”,was/were to have done表示计划、安排要做的事,而实际上并没有做,再看D,过去进行时表示的是过去即将发生的事,A如果是would like to have也就对了。表示“碰巧”的句型:sb. happens to do… =" It" happens that sb….