As people slowly learn to cure diseases, control floods, prevent hunger, and stop wars, fewer people die every year. As a result, the population of the world is becoming larger. In 1925 there were about 2 billion people in the world; today there are over 6 billion.
When the number rises, extra mouths must be fed. New lands must be brought under development, or land already farmed must be made to produce more crops. In some areas the land is so over-developed that it will be difficult to make it provide more crops. In some areas the population is so large that the land is divided into too tiny units to make improvement possible with farming methods. If a large part of this farming population went into industrial work, the land might be farmed much more productively (多产地) with modern methods.
There is now a race for science, technology, and industry to keep the output of food rising faster than the number of people to be fed. New types of crops, which will grow well in bad weather, are being developed, so there are now farms beyond the Arctic Circle in Siberia and North America. Irrigation (灌溉) and dry-farming methods bring poor lands under the plough. Dams hold back the waters of great rivers, which can provide water for the fields in all seasons and provide electric power for new industries. Industrial chemistry provides fertilizer to suit different soils. Every year, some new methods are made to increase or to protect the food of the world.
【小题1】The author says that the world population is increasing because _____.

We have been driving in fog all morning, but the fog is lifting now. The little seaside villages are 36 , one by one. "There is my grandmother's house," I say, 37 across the bay to a shabby old house.

I am in Nova Scotia on a pilgrimage (朝圣) with Lise, my granddaughter, seeking roots for her, retracing (追溯) 38 memory for me. Lise was one of the mobile children, 39 from house to house in childhood. She longs for a sense of 40 , and so we have come to Nova Scotia where my husband and I were born and where our ancestors 41 for 200 years.

We soon 42 by the house and I tell her what it was like here, the memories 43 back, swift as the tide (潮水).

Suddenly, I long to walk again in the 44 where I was once so gloriously a child. It still 45 a member of the family, but has not been lived in for a while. We cannot go into the house, but I can still walk 46 the rooms in memory. Here, my mother 47 in her bedroom window and wrote in her diary. I can still see the enthusiastic family 48 into and out of the house. I could never have enough of being 49 them. However, that was long after those childhood days. Lise 50 attentively as I talk and then says, " So this is where I 51 ; where I belong. "

She has 52 her roots. To know where I come from is one of the great longings of the human 53 To be rooted is "to have an origin". We need 54 origin. Looking backward, we discover what is unique in us; learn the 55 of "I". We must all go home again—in reality or memory.

1.                A．appearing       B．moving         C．exposing  D．expanding

2.                A．referring       B．travelling        C．pointing  D．coming

3.                A．shared         B．short           C．fresh D．treasured

4.                A．passed         B．raised          C．moved   D．sent

5.                A．home          B．duty           C．reality    D．relief

6.                A．built           B．lived           C．remained D．explored

7.                A．catch up        B．pull up         C．step down D．come down

8.                A．falling          B．turning         C．rushing   D．bringing

9.                A．yard           B．village          C．room D．house

10.               A．adapts to       B．appeals to       C．belongs to D．occurs to

11.               A．across         B．through        C．along D．past

12.               A．lay            B．played         C．stood D．sat

13.               A．marching       B．looking         C．breaking   D．pouring

14.               A．between       B．with           C．near  D．behind

15.               A．wonders        B．listens          C．reacts D．agrees

16.               A．began          B．grew           C．studied    D．stayed

17.               A．deepened      B．recognized      C．accepted  D．found

18.               A．heart          B．rights          C．interest   D．behaviors

19.               A．one           B．its             C．that  D．every

20.               A．meaning        B．expression      C．connection D．background

---Why do you pay a visit to your parents ________?
---_______ they live in a remote village far from here.

My father used to  on weekends,but now he is used to   every evening.