下列各项中，属于在经济往来结算中经常使用的信用工具是 [ ] ①信用卡 ②支票
题型：选择题
问题：
下列各项中，属于在经济往来结算中经常使用的信用工具是 [ ]
①信用卡 ②支票 ③汇票 ④股票
A、①②④
B、①②③
C、②③④
D、①③④
题型：选择题
根据短文内容，判断正（T）误（F）。
How much sleep do we need? We are all different. Some people need only three or four hours of
sleep a night. Others need ten hours of sleep a night. Most Americans sleep an average of seven to
eight hours a night. After age fifty, the average sleep time goes down 6.5 hours a night.
Most people have a night when they cannot sleep. About one in three Americans has a problem with
sleep .Many of these people cannot fall asleep. The name of this problem is insomnia.
This is not a new problem. Many famous people in history had insomnia. Some of these people had
special ideas to make them sleep. Benjamin Franklin, the famous statesman and inventor, had four beds.
He moved from bed to bed to fall asleep. King Louis 
of France had 413 beds and hoped to fall asleep
in one of them. Mark Twain, the famous American writer ,had a different way. He lay on his side across
the end of his bed!
( )1. We all need eight hours of sleep a night.
( )2. Most Americans sleep 7 to 8 hours a night.
( )3. If a person has insomnia he can never fall asleep.
( )4. Benjamin liked to move beds.
( )5. The title of this passage may be "Sleep".