问题补充:
When you cross the road, you should be and walk
A. carefully; careful
B. careful; carefully
C. careful;, careful
D. carefully; carefully
答案:
A. carefully; careful
(答案→)B. careful; carefully
C. careful;, careful
D. carefully; carefully
解析:考查形容词和副词的用法。句意“当你过马路时,你应该小心,并且要慢行。”be动词是系动词,后用形容词作表语,构成系表结构;walk是动词,副词修饰动词,故用carefully。故选B。