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Đề thi tiếng anh lớp 7 I. Fill the sentences with more, less or fewer. 1. February has ______ days than January. 2. Overpopulation is causing ______ problems than we can imagine. 3. Big cities suffer ______ pollution than the countryside. 4. A teacher needs ______ calories than a farmer. 5. A healthy child requires _____ care than a sick one.