________ you understand this rule, you’ll have no further difficulty. A．OnceB．Un
题型：不详难度：来源：
________ you understand this rule, you’ll have no further difficulty. | A．Once | B．Unless | C．As | D．Until |
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答案
| A |
解析
| once引导的让步状语从句，意为“一旦”。句意为“一旦明白了这条规则，就再也没有困难了”。 |
举一反三
I criticized him, you know, not ________ I hate him but ________ I love him. | A．because; because | B．because; for | C．for; because | D．for; for |
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I was so familiar with her that I recognized her voice I picked up the phone.| A．the moment | B．after | | C．before | D．while |
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| The recent information has been put forward ____ more high school graduates will be admitted into universities. |
He waited ________ the volcano became quiet and he was able to return two days later.| A．when | B．before | C．as | D．until |
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A warning news report from Qatar announces that a group of Islam will continue to kill Americans wherever they are ________ they leave the Arab world forever. | A．even though | B．in case | C．whenever | D．until |
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