_________(53)A.Since B.Out C.From D.Through

The situation is rather complicated ______ we have two managing directors.A．since thatB．in

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He cannot be tired _______ he has walked only half a mile. A：since B：whether C：when

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He s lived in London______.A．since a long timeB．for some timeC．long beforeD．some time ago

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___________[A] Since [B] If [C] Unless [D] While

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_________(52)A.towards B.againstC.upon D.through

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_________(53)A.since B.whereC.though D.when

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So nervous______that she didn’t know how to start her speech.A.since she becameB.would she

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