________ he stops driving himself like this, he"ll have a breakdown.A．UntilB．On
题型：不详难度：来源：
________ he stops driving himself like this, he"ll have a breakdown.| A．Until | B．Once | | C．Since | D．Unless |
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答案
| D |
解析
| D 考察连词。句义：如果他在不停止这么卖命的工作，他就会崩溃。Until意为直到..为止；once一旦；since既然，unless除非，如果不..相当于if..not。根据语境可知D正确。 |
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