Many people who work in London prefer to live outside it, and to

Many people who work in London prefer to live outside it, and to go to their offices, factories or schools every day by train or by bus. even though this 1_______ they have to get up earlier in the morning and 2_______ home later in the evening.
One benefit of living outside London is that houses are 3_______ Even a small flat in London 4_______ a garden costs quite a lot to rent. With the same 5_______, one can get a little house in the 6_______ with a garden of his 7_______.
Then, in the country one can be free 8_______ the noise and hurry of the town. 9_______ one has to get up earlier and spend more time in trains or buses, one can sleep 10_______ at night. and, during weekends and on summer evenings, one can enjoy lhe fresh clean 11_______ of the country. If one likes gardening, one can spend one's 12_______ time digging, planting, watering and doing a lot of other 13_______ which are needed in the garden. Then, when the flowers and 14_______ come up. one has the 15_______ of a person who has shared the secrets of 16_______.
Some people, however, take no 17_______ in country things. For them, happiness 18_______ in the town, with its cinemas and theatres, beautiful shops and busy streets, dance halls and restaurants. Such people would feel that their life was not 19_______ living if they had to live it outside London. A walk in one of the parks and a visit to the sea every summer is 20_______ the country they want.
20
A、what
B、that
C、which
D、all
【正确答案】：D
【题目解析】：句中提到"a walk in one of the parks and a visit to the sea every summer”，通常在park和sea,市里的人们才可以呼吸新鲜空气，远离城市的吵闹，因此对于他们来说这就是他们所想要的全部乡村的东西。ABC均为关系代词，而本空并不是要引导从句，本空连同后面作系动词is的表语。故只有D正确。答案为D。