高等继续教育 / 大学英语语法
正确率：100%
题型描述: 单选题
He ＿＿＿＿ on this essay for twenty minutes, but he has written only a hundred words.
A.worked
B.will have to work
C.has been working
D.will be working
He ＿＿＿＿ on this essay for twenty minutes, but he has written only a hundred words.
A.worked
B.will have to work
C.has been working
D.will be working
参考答案：
佳题速递：