世界上使用人数最多的语言是________，使用范围最广的是________。
汉语；英语
— Jacob was kicked out of the football team.
— ___________ He drinks and smokes too much. [ ]
A. How come?
B. What for?
C. It can't be true.
D. Not surprising.
下列物质中不属于合金的是（ ）
A．黄铜
B．焊锡
C．钢
D．四氧化三铁
