口唇的哪种颜色是一氧化碳中毒的症状()
A.苍白
B.樱桃红色
C.蓝色
D.泛黄色
E.青铜色
参考答案:B
--How is everything going on with you in Europe?
---Quite well. Not so smoothly as I hoped_____.[ ]
A. though
B. instead
C. either
D. too