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47.Widespread wage reductions were imposed during the recession of 1906～ 1909 and price inflation thereafter impeded the recovery of real wage levels.
A.convoluted B.belied C.encumbered D.stoked
48.Helplessly she blinked up at him, feeling a slow lethargy creep through her whole body.
A.provision B.cylinder C.contradiction D.exhaustion
49.The attack was meticulously planned and executed.
A.negligently B.slovenly C.fussily D.discreetly
50.At the same time, medical and social science research began to indicate that retirement itself had detrimental effects.
A.damaging B.magnificent C.useful D.relevant
51.The batteries can be recharged when they run ______.
A.over B.down C.out D.along
52.The rioters headed downtown, ______ they attacked city hall.
A.since B.as C.whereupon D.yet