after which还是after whatAfter _______ had happened he could not continue to work there.A. which B. howC. what D. having【分析】可能误选A。最佳答案选 C。有的同学误选A，是因为认为介词后应接关系代词 which，但实际上，若填关系代词，其前没有先行词，这根据不是一个定语从句。另外，由于 had happened 缺主语，所以B和D也不能选。请再做下面一题(答案选B)：He pointed to ______ looked like a tomb and said, “Ghost.”A. that B. whatC. which D. as

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