--- Has your brother returned from the USA yet? --- Yes, but he ____ here for only two days before his pany sent him to Australia.A.stayedB.has stayedC.will stayD.was staying
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A解析考查时态。句意：你的弟弟已经从美国回来了吗？是的，但是在他的公司派他去澳大利亚之前他只在这呆了两天。派去澳大利亚是过去的事，所以在这呆两天也是过去的事，要用一般过去时态。选A。