Question

He must have finished his homework for a long time, _____ he? A．mustn’t B．didn’t C．...

He must have finished his homework for a long time, _____ he? A．mustn’t B．didn’t C．needn’t D．hasn’t

Answer 1

D
考查反义疑问句。陈述部分用must
+
have
+
V-ed表示推测时问句部分动词用过去时形式，如果强调动作的完成（一般没有明确的过去时间状语），问句要用“haven’t/hasn’t+主语”。根据have
finished
his
homework
for
a
long
time可知强调的是动作的完成，故选D。