最早通车到贵阳的是哪一条铁路（）？
A、川黔
B、贵昆
C、黔桂
D、湘黔
参考答案：C
沥青砼面层接茬应紧密、平顺，（）不应枯焦。
You'd better not _____ here. The smoking area is over there. [ ]
A. smoke
B. to smoke
C. smoking
