求分析—Do you have any idea when the experiment was carried out?—I hear it was not until last year _____ their plan was approved.A.that B.when C.before D.once

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求分析—Do you have any idea when the experiment was carried out?—I hear it was not until last year _____ their plan was approved.A.that B.when C.before D.once
求分析
—Do you have any idea when the experiment was carried out?
—I hear it was not until last year _____ their plan was approved.
A.that B.when C.before D.once

求分析—Do you have any idea when the experiment was carried out?—I hear it was not until last year _____ their plan was approved.A.that B.when C.before D.once
—Do you have any idea when the experiment was carried out?
-- I hear it was not until last year ___when__ their plan was approved.
==it was not until last year WHEN _ their plan was approved THAT the experiment was carried out
===the experiment was carried out LAST YEAR when__ their plan was approved.

选择A；
It was ```that 为强调句型

do you have any. Do you have any Do you have any hobbies?—______________________. Do you have any ideas do you have any water? Do you have any bread? Do you have any? 是什么意思 Do you have any openings? Do you have any apples? Do you have any questions? Do you have any money? Do you have any trouble? Do you have any glasses? do you have any enlish classes?any do you have any...可不可以换成do you have some. Do you have any hobbies?(改为陈述句) Do you have any hobbies?肯定回答翻译do you have any specifc idea