英语定于从句单选.高手进.急-do u have any idea when the experiments was carried out?-.i hear it was not until last year[ ] their plan has been approved.A.thatB.whenC.beforeD.once答案是B为什么啊 ?还有请翻译一下题目.答案
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英语定于从句单选.高手进.急-do u have any idea when the experiments was carried out?-.i hear it was not until last year[ ] their plan has been approved.A.thatB.whenC.beforeD.once答案是B为什么啊 ?还有请翻译一下题目.答案
英语定于从句单选.高手进.急
-do u have any idea when the experiments was carried out?
-.i hear it was not until last year[ ] their plan has been approved.
A.that
B.when
C.before
D.once
答案是B为什么啊 ?还有请翻译一下题目.
答案确定是b，只知道回答部分是个省略句，不清楚为什么选when
英语定于从句单选.高手进.急-do u have any idea when the experiments was carried out?-.i hear it was not until last year[ ] their plan has been approved.A.thatB.whenC.beforeD.once答案是B为什么啊 ?还有请翻译一下题目.答案
-你知道这个实验是什么时候开始实行的吗?
-我听说是直到去年才批准的
when在定从里知道前面的last year,在定语从句里做时间状语.last year 是先行词.
我一开始也觉得是A,是强调句，it is ... that 但是看了问句觉得确实是B.。when在定从里知道前面的last year，在定从里做时间状语。it was not until last year. their plan was approved last year.
这个地方确实应该选B
因为如果是A的话，从语法上说没错，这是not..until的强调句形式。但从意思上看就不行了。
有字数限制，我不能多说。你仔细考虑问和答的关系，其实这是个定语从句，last year 是先行词。
A
until... that是固定搭配
=更新=
不好意思没看清 答案是B吗？我觉得不对啊.... 不如等你老师讲解了后短信告诉我一下可以吗 呵呵
翻译：
-你知道这个实验是什么时候开始实行的吗？
-我听说是直到去年才批准的