can answer questions in a more logical, complete and creative way if adults________.
| 完形填空。 | ||||
| We have known for a long time that flowers of different plants open and close at different times of day. This is so 1 that there seems to be no need to ask the reason for it. Yet no one 2 understands why flowers open and close like this at particular times. The process is not as 3 as we might think, as recent experiments have shown. In one study, flowers were kept in constant 4 . We might expect that the flowers, without any information about the time of day, did not open as they 5 do. As a matter of fact, they 6 to open at their usual time. This suggests that they have some mysterious(神秘的) way of knowing the 7 . Their sense of time does not 8 information from the outside world; it is, so to speak, inside them, a kind of "inner clock". This 9 may not seem to be very important. However, it was later found that not just plants but also 10 , including man, have this "inner clock" which 11 the working of their bodies and influences their activities. Men, then, are also influenced by this mysterious 12 . Whether we wish it or not, it affects such things in our life as our need for sleep, our need for food. In the past, this did not really 13 because people lived in natural condition. In  the 14 world, things are different; now there are spacemen, airplane pilots and, in ordinary life, a lot of people who have to work at night. It would be very 15 , then, to know more about the "inner clock". Such things as flowers might help us understand more about ourselves. | ||||
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| 阅读理解。 | ||
| A new eight-kilometre road is under construction that links the port area with the motorway system. It is expected to carry 20,000 trucks and cars a day, which greatly reduces the overcrowded traffic in the center of the city. As part of the project, two four-kilometre road tunnels are being built below the central area of the city, one for traffic to the north and the other for traffic to the south. The two tunnels are about 20 metres below the surface and are 12 metres wide, providing for two lanes of traffic in each direction. In the upper part of the tunnel two air-conditioning pipes remove the waste gas of trucks and cars and keep the quality of air inside the tunnel. The lighting is at the top of the tunnel, practically at its highest point. There will also be electronic signs at frequent intervals (间隔). They show traffic conditions ahead, and can be seen clearly by drivers. The wall is made up of four main elements, which include a waterproofing covering and, on the inside of the tunnel, a concrete lining (混凝土衬砌).
Other systems in the tunnel will include emergency phones. | ||
| 1. Each of the tunnels under construction is _____. | ||
| A. eight kilometers long and twenty metres wide B. eight kilometers long and six metres wide C. four kilometers long and twenty metres wide D. four kilometers long and six metres wide | ||
| 2. Which part of the tunnel in the diagram is used to pipe out extra water? | ||
| A. 1. B. 3. C. 5. D. 6. | ||
| 3. Driving in the tunnel, one can know the traffic conditions ahead through _____. | ||
| A. the lights B. the electronic signs C. the trucks and cars D. the emergency phones | ||
| 4. The passage is mainly about _____. | ||
| A. the construction of a road B. the design of a road C. the construction of two tunnels D. the design of two tunnels |
