摘要： I won’t tell the student the answer to the math problem until he on it for more than an hour. A. has been working B. will have worked C. would have worked D. had worked
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I won’t tell the student the answer to the math problem until he______on it for more than an hour.
A.has been working
B.will have worked
C.will have been working
D.had worked
查看习题详情和答案>>I won’t tell the student the answer to the math problem until he ______ on it for more than an hour.
A. has been working B. will have worked
C. will have been working D. had worked
查看习题详情和答案>>I won't tell the student the answer to the math problem until he ____on it for more than an hour.
A. has been working B. will have worked
C. will have been working D. had worked
查看习题详情和答案>>