I up to $5 000 by the time the new term begins in September.A. have savedB. will have sav

问题补充：

I up to $5 000 by the time the new term begins in September.

A. have saved

B. will have saved

C. will be saving

D. had saved

答案：

A. have saved

(答案→)B. will have saved

C. will be saving

D. had saved

解析：B 考察动词时态。句意：当九月份新学期开始时，我将会攒够5000美元。By the time引导的是时间状语从句，在时间状语从句里，从句一般用现在时，主句使用将来时。同时by+时间，做时间状语的时候，谓语动词要使用完成时，因此本句话主句的谓语动词应该使用将来完成时。故B正确。