问题补充：
I don’t think he has completed the task , ?
A. does he
B. do I
C. hasn’t he
D. has he
答案：
A. does he
B. do I
C. hasn’t he
(答案→)D. has he
解析：考查反义疑问句。本句是一个否定前移句，本来的语序为I think he has not completed the task.句中的I think作为插入语可以省略，句子就变成了he has not completed the task,其反义疑问句为has he.故D正确。
