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 |
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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 |