John opened the door ______his father came in.A.after B.when C.untile D.while如题,为什么选B不选A?

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John opened the door ______his father came in.A.after B.when C.untile D.while如题,为什么选B不选A?

John opened the door ______his father came in.A.after B.when C.untile D.while如题,为什么选B不选A?
John opened the door ______his father came in.A.after B.when C.untile D.while
如题,为什么选B不选A?

John opened the door ______his father came in.A.after B.when C.untile D.while如题,为什么选B不选A?
这句话的意思是
他爸进来时,John打开了门
不能根据字面意思来
when表示同时
after 就不通了