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49.A. important     B. necessary     C. practical        D. possible

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48.A. full up with  B. filled up of    C. filled up with     D. full with

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47.A. such as   B. such like      C. for example      D. so as

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46.A. Otherwise  B. Or      C. But        D. However

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45.A. for      B. because    C. since       D. when

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44.A. spend     B. cost       C. take          D. pay

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43.A. advantages    B. mistakes   C. wrongs           D. disadvantages

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42.A. accidents      B. incidents     C. events          D. things

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41.A. keeping      B. keep       C. leaving           D. leave

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40.A. keeping touch with  B. getting in touch to  C. losing touch with  D. keeping in touch with

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