题目

—Tommy is planning to buy a car. —I know. By next month, he________enough for a used one. A. saves                           B. saved C. will save                       D. will have saved 答案：D 解析：根据时间状语by next month可确定，此处应用将来完成时，表示“到下个月为止，他将攒够买一辆二手车的钱。”

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