_you_further problems with your printer,contact your dea

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/11 17:15:10

___you___further problems with your printer,contact your dealer for advice.
抱歉没打完！A.If,had B.have,had C.should,have D.in case,had
解释为省略if的对将来的虚拟，should提前，可是A项不也能构成将来虚拟吗？为何不可？

选C A的话虚拟现在时表示与现在事实相反的假设,其if 从句的谓语形式用动词的过去式(be 一般用were),主句用would/ should/ could/ might +动词原形,例如：If I were in your position I would marry her.

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