问题
选择题
—___________ 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
答案
D
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。
