赞题库-背景图
单项选择题

When a driver sees the sign number one, he must ______.

A．always go at 30 miles an hour
B．go at more than 30 miles an hour
C．not go at more than 30 miles an hour
D．stop
<上一题 目录 下一题>
热门试题

单项选择题Scientists and experts have proved that the pattern of a human being's finger skin ______.

A．is similar to his mother's
B．is valuable to himself only
C．is like that of others with the same type of blood
D．is different from that of all others

单项选择题Some criminals remove their own finger-prints by ______.

A．using printer's ink
B．injuring the inner skin
C．damaging the outer skin
D．damaging the color