Driving on the highway ______ be very da
题型：选择题
问题：
Driving on the highway ______ be very dangerous, so you ______ be too careful.
A．should; ought to
B．could; should
C．might; mustn’t
D．can; can’t
Driving on the highway ______ be very dangerous, so you ______ be too careful.
A．should; ought to
B．could; should
C．might; mustn’t
D．can; can’t