______ you ______ further problems with your printer contact your dealer for advice.[2005
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______ you ______ further problems with your printer, contact your dealer for advice.[2005]
A．If, had
B．Have, had
C．Should, have
D．In case, had
请帮忙给出正确答案和分析，谢谢！
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正确答案：C
根据句意，本句表示对将来事情的虚拟，条件从句中谓语动词可以使用“should+动词原形”结构；如果省略条件从句引导词if的话，should应该提到句首。因此本题应该选择C。