0  357449  357457  357463  357467  357473  357475  357479  357485  357487  357493  357499  357503  357505  357509  357515  357517  357523  357527  357529  357533  357535  357539  357541  357543  357544  357545  357547  357548  357549  357551  357553  357557  357559  357563  357565  357569  357575  357577  357583  357587  357589  357593  357599  357605  357607  357613  357617  357619  357625  357629  357635  357643  447090 

51.A.where         B.which          C.that           D.and

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50.A.food           B.energy         C.beauty         D.charming

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49.A.cleaning        B.heating         C.cooling         D.lighting

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48.A.for            B.as            C.so            D.because

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47.A.compound      B.chemical        C.ecological       D.industrial

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46.A.speed up        B.carry on        C.slow down      D.smooth away

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45.A.Depending on    B.Judging by      C.Protected from   D.Suffering from

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44.A.troubles        B.great efforts     C.a few months    D.years

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43.A.on purpose      B.for wood       C.by chance       D.at ease

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42.A.designers       B.purposes        C.disadvantages    D.advantages

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