——　Wasthatthenewcomerwhowalkedby?——　＿＿＿＿＿A.ItmustbethatB.Itmusthavebe

发布时间：2020-08-14 10:25:06

——　Was that the new er who walked by? ——　＿＿＿＿＿A.It must be thatB.It must have beenC.He must beD.This must have been

网友回答

B解析表示对过去情况的猜测，用“情态动词＋have done”；而it代替上文所指的new er。
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