——Tommy is plannning to buy a car.——I know. By next month he enough for a used one.A. sav

问题补充：

——Tommy is plannning 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：

A. saves

B. saved

C. will save

(答案→)D. will have saved

解析：考查动词时态。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”。