The lecture paused__________expecting his audience to ask questions on the point he had just made.A.for B.while C.as if D.as

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• The lecture paused__________expecting his audience to ask questions on the point he had just made.A.for B.while C.as if D.as
• The lecture paused__________expecting his audience to ask questions on the point he had just made.
• The professor paused as if ----- his sudents to ask questions on the point he had just made
• The professor could hardly find sufficient grounds __his arguments in favour of the new theoryA.to be based on B.to base on C.which to base on D.on which to base