问题标题：
Accordingtowhathecomplainedabout,somethingmusthavegonewrongwiththecomputer,______?1Accordingtowhathecomplainedabout,somethingmusthavegonewrongwiththecomputer,______?A.mustn'titB.didn’theC.hasn’the
问题描述：
Accordingtowhathecomplainedabout,somethingmusthavegonewrongwiththecomputer,______?
1Accordingtowhathecomplainedabout,somethingmusthavegonewrongwiththecomputer,
______?
A.mustn'titB.didn’theC.hasn’theD.didn’tit
答案D,说下理由
高治国回答：
must用来表示猜测时,其反义疑问句的助动词须与原先的助动词相同
此句中,因为是过去时,have应该用did
再如
hemustbeworkingrightnow,isn'the?
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