1.Bungee jumping is a sport _____ a person makes a vertical jump from a high platform with a rubber cord tied to their ankles so that they bounce
A which B when C where D that
为什么不能选D呢 ?
答：当你这么问时,最好再加一句：看成是sport的同位语从句可以不?
正式回答：神州行, 我看行!
更正式回答：C
译：蹦极是一项运动,在运动中（where=in which),一个人从一个很高的平台作一个垂直的跳跃.有一根橡皮软线绑住两只脚踝（这个their是不是要改为his啊?）,这样他们（?）反弹.（句子的后面部分又乱写了!）
析：本题考定语从句的关系词,不是考名词性从句的,你想到同位语从句,偏离了出题者的思路,这叫离题!
即使是是名词性从句,见过sport后跟同位语从句的吗?如何解释?（我们学过的常见的后面跟同位语从句的词有哪些?复习一下）
我说你行,是因为,这个that是个万金油,已经给用滥了,它可以当关系副词用知道不?
the way that sb. did sth. 就是由that来引导定语从句的,请问that在从句中作主语还是宾语?
蹦极(Bungee Jumping)是一项户外休闲活动.跳跃者站在约40米以上高度的位置,用橡皮绳固定住后跳下,落地前弹起.反复弹起落下,重复多次直到弹性消失.
Bungee jumping is a recreational activity that involves jumping from a high surface while attached to an elastic cord. One end of this elastic cord is attached to the jumper’s body, while the other end is attached to a stationary object at the jumping point. Typically, bungee jumping involves leaping from jumping points that are several hundred feet or meters high. The elastic cord used in this activity is designed to stretch during the jumper's fall and snap back up repeatedly. This causes the jumper to bounce up and down over the length of the jumping area until the energy from the jump has been depleted. at the north of theran near the Alborz mounthen is such a good place that we can trying this sport.
You can’t win the game_______you never practice during this period.
A when B as C while D once 答案是A 为什么不能选B
答：因为原题句中就是when.这个when的用法少见,但确实有,表示“在.的条件下”,词典上有类似的例句,相当于if的意思.所以出题者不敢放if进选项,而once表示“一旦”,不会与never连用,因为矛盾了.
当你想到用As时,请将你的想法（就是放as进去后的理解,翻译出来）这样问问题更好.
as的用法很多,作从属连词都有好几种用法,表示“时间、原因、让步、方式,比较”.
译：你在这个时期从不练习,在这样的情况下,你是不可能赢得比赛的.
《Longman》上when的这种用法：
if (with present tense): No one can make a dress when they haven't learnt how.
剑桥高级学习词典 :
when 2
when (CONSIDERING THAT) /wen/
conjunction
considering the fact that:
How can you say you don't like something when you've never even tried it!
You can't complain of being lonely when you don't make any effort to meet people.
Why is she training to be a teacher when she doesn't even like children?
I don't suppose I can really call myself a vegetarian when I eat fish.
当你想用as时,请翻译,思考其中的逻辑关系,注意句子中的时态.