B．do with

　　C．end with

　　D．start from

　　答案　D　[根据后面的the very beginning可知，此处填D项，start from the very beginning从一开始。]

　　20．A.types

　　B．purpose

　　C．shapes

　　D．results

　　答案　B　[根据下文“The engineer can choose the type best suited to the river and the land nearby”，此处应该选B，即“每座桥都要适合其特殊目的”。be suited to适合。]

　　Ⅴ.阅读理解

　　Vegetable gardening is the relaxing(放松)art and science of turning a love for growing plants into a worthwhile activity.

　　Vegetable gardeners agree that many home­grown vegetables picked at their best are better than those vegetables bought from markets.From spring through late fall，a well­planned and well­kept garden can provide a supply of fresh vegetables，thus increasing the nutrition of the family diet.Freezers make it possible to keep some of the vegetables to be enjoyed at a later date.Other vegetables can be stored for a few months in a cool area.

　　Having vegetables in the backyard makes home gardening attractive to many people.Besides，vegetable gardening provides exercise and fun for families.

　　Though the money spent for a garden may be little，one can't escape the fact that gardening needs hard work and time.Many of the gardening tasks must be performed at times that are most inconvenient.Not doing jobs that should be done regularly may result in failure and a negative(消极的)feeling.

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