Luckily,the back tires of their car stayed on the road. Otherwise, the young couplewould have driven right into a pit twenty feet wide and thirty feet deep!
The man andwoman were coming home from a party. They were enjoying the landscape around Swansea,Wales. Suddenly, they found the front of their car leaning into a huge hole.The car barely hung onto the edge of the pit. It swayed back and forth like thearm of a balance.
In theirprecarious position, the couple knew that each movement they made could be amatter of life and death. Slowly, slowly, they edged toward the backseat. Theneach opened a back door. And on the count of three, they jumped out together.The accident was so scary that they ran a long way
before they calmed down. But later theyreturned to see what had happened. They found that a big chunk of the road hadsunk into the ground! And at the bottom of the pit lay their car--roof down andwheels up.
Was this mystery ofthe sunken road ever solved? It turned out that an abandoned mine shaft layunder the road. It had collapsed and taken the pavement with it. Layers oftunnels intersect be-neath the city of Swansea. The tunnels were built so manyyears ago that no one knows where they end or begin. The tunnels are shaky,like those that ants build in the sand. No one knows when the
entire city might collapse.
第44题单选 This passage is primarily about
A.driving carefully
B.the city of Swansea, Wales
C.a road that caved in
D.tunnels that ants build
第45题单选 It is probably true that __
A.the other roads in Swansea are prettysafe
B.other sections of Swansea will cave insometime
C.everyone should move out of Swansea
D.Swansea is a very interesting city
第46题单选 The writer creates interest in thefirst sentence by using
A.a funny story
B.romantic imagery
C.a vivid description
D.a precise argument
第47题单选 The underlined word"precarious" in the third paragraph means __
A.unexpected
B.dangerous
C.unusual
D.ridiculous
Researchershave found that REM (rapid eye movement)sleep is important to human beings.Thistype of sleep generally occurs four or five times during one night of sleeplasting five minutes to forty minutes for each occurrence. The deeper aperson´s sleep becomes, the longer the periods of rapid eye movement.
There are physicalchanges in the body to show that a person has changed from NREM (non-rapid eyemovement)to REM sleep. Breathing becomes faster, the heart rate increases, and,as the name implies, the eyes begin to move quickly.
Accompanying thesephysical changes in the body there is a very important characteristic of REMsleep. It is during REM sleep that a person dreams.
第48题单选 According to the passage,howoften does REM sleep occur in one night?
A.Once.
B.Twice.
C.Four or five times.
D.Forty times.
第49题单选 The word "deeper" inParagraph 1 is closest in meaning to
A.heavier
B.louderC.stronger
D.happier
第50题单选 Which of the following shows that aperson is NOT dreaming in his sleep?
A.His eyes begin to move.
B.His breathing becomes faster.
C.His heart rate increases.
D.His eyes stop moving.
第51题单选 Which of the following is the besttitle of the article?
A.REM Sleep
B.Two Types of Sleep
C.Sleepers
D.What Happens to Sleepers
2017成考报名：2017年成人高考报名时间/入口
2017通关计划：2017年成人高考81天备考复习通关计划
