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1
If she _______________ how to calibrate the instrument, she _______________ done the experiment.knows, will haveknew, hadhad known, could haveshould have known, would hav...
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4
Choose the grammatically CORRECT sentence:Two and two add four.Two and two become four.Two and two are four.Two and two make four.
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11
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16
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Newspapers are a constant source of delight and recreation for me. The ________ trouble is that I read _______ many of them.even, quiteeven, tooonly, quiteonly, too
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19