题目

I will call you as soon as he _________ here tomorrow.A.will arrive B.arrives C.arrived 答案:【答案】B【解析】句意:他明天一到我就给你打电话。考查as soon as的用法。will arrive一般将来时;arrives动词三单;arrived一般过去时;as soon as表示“一……就”,用主将从现,根据“he _________ here tomorrow.”可知此处从句缺谓语动词,可推测出此处是动词三单,故选B。下列离子方程式中错误的是(  )A.铁跟稀硫酸反应:2Fe+6H+?2Fe3++3H2↑B.碳酸钙溶液跟盐酸反应:CaCO3+2H+?Ca2++2H2O+CO2↑C.醋酸跟氢氧化钾溶液反应:CH3COOH+OH-?CH3COO-+H2OD.碳酸钡跟盐酸溶液反应:BaCO3+2H+?Ba2++H2O+CO2↑
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