单项选择题

The advantage of chevrons over straight horizontal bars is that the former ______.

A．can keep drivers awake
B．can cut road accidents completely
C．will have a longer effect on drivers
D．will look more attractive
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单项选择题
In the past, news was _______.
A．sent by e - mail
B．passed from one person to another
C．sent by letter
D．sent by telephone
单项选择题
The habit of reading newspapers is ______.
A．uncommon in the world
B．not popular in U.S.A.
C．widespread in the world
D．founded among a few families
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