单选题 I ______ writing the article by the time you get back.
A．shall finish B．must have finished
C．have finished D．shall have finished

【正确答案】 D
【答案解析】[解析] 本题考查句子时态。本句为将来完成时，表示在将来的某一时刻或将来的某一时刻之前已完成，这一动作可以继续下去。