is surprising to us is that Tom can speak English fluently as though he were a native speakerA.WhatB.ThatC.WhichD.As
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A解析试题分析：考查名词性从句中的主语从句。 is surprising to us是主语从句，从句缺少主语用what；构成What... is that...句型。that在名词性从句中不作成分；which指哪一个；as引导非限制性定语从句，本句没逗号。故选A。考点：考查名词性从句