外部收益率
参考答案：
方案在计算期内支出的终值与各期收入再投资的净收益的终值累计相等时的收益率。
选择与画线部分意思相同或相近的选项。
Have you fixed them up? [ ]
A. repair
B. repairs
C. repairing
D. repaired
John thinks it won’t be long _________ he finishes the tough work.
A．when
B．after
C．since
D．before
