【题目】—I hear that Jason is planning to buy a car.
—I know. By next month, heenough for a used one.
A.will have saved
B.will be saving
C.has saved
D.saves

【答案】A
【解析】句意：——我听说Jason计划买一辆车。——我知道。到下个月，他就攒够了足够的钱买一辆二手车。此处解题关键是：by next month是将来的时间状语，所以用将来完成时。选A。