题目内容
19．I have bought this TV for ten years and I am still using it now．bought 改为kept．分析 我这个电视已经有十年了，我现在还在用它．
解答 82．bought 改为 kept 从后面for ten years一段时间可知，前面要使用延续性动词，不可用瞬间性动词buy（不可能十年间一直在买），buy对应的延续性动词是keep，have kept表示一种状态，构成现在完成时（have done），故bought 改为 kept．
点评 英语中，动词按其动作发生的方式、动作发生过程的长短，可分为延续性动词延续性动词和瞬间性动词．延续性动词表示能够延续的动作，这种动作可以延续下去或产生持久影响，瞬间性动词表示不能延续的动作，这种动作发生后立即结束．
练习册系列答案
相关题目
14．Being a doctor is one of the few professions if you make a mistake，it can mean somebody's life．（ ）
| A． | that | B． | where | C． | when | D． | which |
We've been covering standing desks for a long time now because experts agree that sitting all day is killing us．We want to be productive while also keeping our bodies healthy．Over the years，there have been several solutions to this from fixed standing desks to adjustable ones，portable desks to ones that change into shelves．
3．If parents don't teach their child how to _____ himself，he will do anything at will．（ ）
| A． | believe | B． | behave | C． | help | D． | enjoy |
4．
76．F
A world record is every athlete's dream，but the hard-won records of a few years ago are mostly just today's qualifying times．Roger Bannister's famous four-minute mile of 1956has been beaten by nearly 15seconds，while almost an hour and twenty minutes has been taken off the women's marathon since.1953．‘Faster，higher，stronger'，is the Olympic motto，and today's competitors continue to push back the boundaries of what the body can achieve．But one wonders if this can continue．
77．E
The last forty years have seen many important technological advances．For example，since the introduction of strong flexible，fiberglass poles，over a meter has been added to the pole vault record．There have also been important developments in the design of the running shoe．And while a shoe won't actually make someone run faster，modern shoes do mean many more miles of comfortable，injury-free training．
78．C
Pushing back the limits now depends more on science，technology and medicine than anything else．Athletic technique，training programmes and diets are all being studied to find ways of taking a few more seconds off or adding a few more centimetres to that elusive world record．It seems that natural ability and hard work are no longer enough．
79．B
The research to find more efficient ways of moving goes on．Analysis of an athlete's style is particularly useful for events like jumping and throwing．Studies show that long jumpers need to concentrate not on the speed of approach，as once thought，but on the angle their bodies make with the ground as they take off．However，the rules governing each sport limit advances achieved by new styles．For instance only one-footed takeoffs are allowed in the high jump．
80．D
In the future，it should be possible to develop a more individual approach to training programmes．Athletes will keep detailed diaries and collect data to help predict the point when training becomes overtraining，the cause of many injuries．If athletes feed all their information into a database，it may then be possible to predict patterns and to advise them individually when they should cut．
| A．What does the Olympic Motto mean？ B．Research on individual styles improves performance． C．Research holds the key to success． D．Personalized programs will help． E．New equipment has made a difference． F．Is there a limit to record-breaking？ |
A world record is every athlete's dream，but the hard-won records of a few years ago are mostly just today's qualifying times．Roger Bannister's famous four-minute mile of 1956has been beaten by nearly 15seconds，while almost an hour and twenty minutes has been taken off the women's marathon since.1953．‘Faster，higher，stronger'，is the Olympic motto，and today's competitors continue to push back the boundaries of what the body can achieve．But one wonders if this can continue．
77．E
The last forty years have seen many important technological advances．For example，since the introduction of strong flexible，fiberglass poles，over a meter has been added to the pole vault record．There have also been important developments in the design of the running shoe．And while a shoe won't actually make someone run faster，modern shoes do mean many more miles of comfortable，injury-free training．
78．C
Pushing back the limits now depends more on science，technology and medicine than anything else．Athletic technique，training programmes and diets are all being studied to find ways of taking a few more seconds off or adding a few more centimetres to that elusive world record．It seems that natural ability and hard work are no longer enough．
79．B
The research to find more efficient ways of moving goes on．Analysis of an athlete's style is particularly useful for events like jumping and throwing．Studies show that long jumpers need to concentrate not on the speed of approach，as once thought，but on the angle their bodies make with the ground as they take off．However，the rules governing each sport limit advances achieved by new styles．For instance only one-footed takeoffs are allowed in the high jump．
80．D
In the future，it should be possible to develop a more individual approach to training programmes．Athletes will keep detailed diaries and collect data to help predict the point when training becomes overtraining，the cause of many injuries．If athletes feed all their information into a database，it may then be possible to predict patterns and to advise them individually when they should cut．