摘要： -- Was that the new comer who walked by? -- ＿＿＿＿＿. A.It must be that B.It must have been C.He must be D.This must have been
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—— Was that the new comer who walked by?
—— ＿＿＿＿＿.
A.It must be that B.It must have been C.He must be D.This must have been
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