2. 外语
  3. ______you______further problems with your printer, contact your dealer for advice.

______you______further problems with your printer, contact your dealer for advice.

admin2015-05-26  75
问题 ______you______further problems with your printer, contact your dealer for advice.
选项 A、If, had
B、Have, had
C、Should, have
D、In case, had
答案A
解析 “might+have done”表示“可能已经做了”表示对过去情况的推测，must havedone表示“一定做了”，could have done表示“本来能够做某事而没有做”，三项均不符合句意。should have done表示“本应该做某事，而实际没做”，符合句意，A为答案。
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