with a murder, the young man is being questioned by the police.
A. To connect B. Having connected C. Connecting D. Connected
科目：高中英语 来源： 题型：阅读理解
第四节 阅读理解（共20小题。每小题2分，满分40分）
It is well-known that fatigue driving(疲劳驾驶)is very dangerous．A device that stops drivers from falling asleep at the wheel is about to undergo testing at Department of Transport laboratories and could go on sale within 12 months．
The device is a kind of system, which is called Driver Alert，and it aims to reduce deadly road accidents by 20％—40％that are caused by tiredness．Airline pilots can also use it to reduce the 30％ of all pilot-error accidents that are related to fatigue．
Driver Alert is based on a computerized wristband．The device，worn by drivers or pilots，gives out a sound about every four minutes during a car journey．After each sound the driver must respond by squeezing the steering wheel．A sensor in the wristband detects this pressing action and measures the time between the sound and the driver’s response．
Driver’s response time is directly related to tiredness．Usually, a watchful driver would take about 400 milliseconds to respond，but once that falls to more than 500 milliseconds, it suggests that the driver is getting sleepy．
In such cases the device gives out more regular and louder sounds，showing that the driver should open a window or stop for a rest．If the driver’s response continues to slow down，the sounds become more frequent until a nonstop alarm warns that the driver must stop as soon as possible．
The device has been delivered to the department’s laboratories for testing．If these tests, scheduled for six months’ time，are successful，the makers will bring the product to market within about a year．
1．According to the text，Driver Alert ________
A．aims to reduce tiredness-related accidents B．has been on sale for12 months
C．has gone through testing at laboratories D．aims to prevent drivers from sleeping
2．How should a driver respond to the sounds from Driver Alert?
A．By sounding a warning． B．By checking the driving time．
C．By touching the wrist band． D．By pressing the steering wheel．
3．We Can learn from the text that the driver needs to stop for a break when his response time is ________.
A．about 400 milliseconds B．over 4 seconds
C．below 500 milliseconds D．about 4 minutes
4．What’s the main idea of the last paragraph?
A．The device is expected to be marketed in about one year．
B．The device will go through the tests soon．
C．The tests have been scheduled for six months．
D．All the drivers will soon use the Driver Alert．
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A. when B. which C. that D. where
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It used to be thought _____ the Earth was flat.
A. as B. when
C. since D. that
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She can’t help ____ the house because she’s busy making a cake.
A cleaningB. to clean
C. cleanedD. being cleaned
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---Did you enjoy his speech?
---Sure, what he said really ____.
A. makes sense B. makes a difference C. makes sure D. makes it
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It’s a very kind offer, but I really _____ accept it.
A. mustn’t B. needn’t
C. can’t D. don’t
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. _____ that they had made an important discovery in science.
A.Little they realized B. They had realized little
C.Little did they realize D. Little had they realized
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