1.Unfortunately,women were not admitted to university in the

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1.Unfortunately,women were not admitted to university in the past,____,nowadays,they have got equal rights.
A,while B,when C,as D,since
2,____ cloning is not allowde in many countries,there are still many people eager for it.
A,While B,Since C,Before D,Unless
3,I felt my heart ____ so fast.
A,beating B,striking C,knocking D,hitting
请问老师答案,最重要的是说明理由.请从语法的角度详细解释,

1.A 不幸的是,在过去妇女是不能上大学的.然而,现如今,他们有了（和男性）一样平等的权利.while是转折连词,表示转折及对比.
2.A 虽然克隆技术在许多国家是不被允许使用的,但是还是有很多人渴望使用克隆技术.while是连词,表示虽然,引起让步状语从句.
3.A 该题考查动词辨析.beat表示有节律地跳动.strike指钟表的敲打,或击打.knock是普用语,比如敲门.hit是用力打的意思,具有攻击性.

to不定式的用法题 To be admitted to a university in the uk, 用英语解释句子1.In ancient times,women were not allowed to work out She was admitted to the university,____she had always dreame 解决几个英语问题1.you'll not be admitted back in这里的admitted后面为什么不用to which will cause him to not be admitted to a good university Lily was not admitted into her ideal university.She lay in b 英语回答问题1:why the women were not allowed to compete the Olympi Me in the end not your Unfortunately Heart only It was lucky for him to be admitted _ the dream university h The good news that he had been admitted to Peking University women who were unemployed were included in the research In east africa,the africans were showing ( ) respect ,not to