—Be quiet, Mr. Smith is coming.
—Don’t worry. It ＿＿＿ be him. Mr. Smith is much taller.
A. mustn’t B. must C. can’t
—Be quiet, Mr. Smith is coming.
—Don’t worry. It ＿＿＿ be him. Mr. Smith is much taller.
A. mustn’t B. must C. can’t
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