单选题 I hope they ______ this road by the time we come back next summer.
A. have repaired B. will repair
C. are to repair D. will have repaired

【正确答案】 D
【答案解析】[解析] 本题测试的是动词时态的用法。by the time引导的从句中有将来时间状语next summer，其主句应用将来完成时。