___you ____further problems with your printer,contact your dealer for advice.should had ,为什么不能用 in case ,that

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___you ____further problems with your printer,contact your dealer for advice.should had ,
为什么不能用 in case ,that

你的答案是错的.应该是should -- - have.(should +动词原形)
in case (== if) +句子 :如果,万一- - - - .
Should you have further problems with your printer(条件状语从句部分),contact your dealer for advice(主句部分)
=== In case you should have further problems with your printer,contact your dealer for advice