— he have apologized to Kate?
—Yes,he .Otherwise,she couldn’t be dating with him now.
A. Must;can
B. Can;can
C. Must;must have
D. Can;must have
网友回答
A. Must;can
B. Can;can
C. Must;must have
(答案→)D. Can;must have
解析：考查情态动词后面跟完成式的用法。疑问句句中推测用can,肯定句中用must,must have done结构中，可以承上文省略done，但一定要保留have。