Therewassomethingwrongwiththenetwork,orthee-mail____earlier.A.couldhave

There was something wrong with the network, or the e-mail____ earlier.A.could have been sentB.might be sentC.need have been sentD.must be sent

A解析试题分析：考查隐含的虚拟语气：句意：网络有问题了，否则电子邮件可能早就被送到了。这里的or相当于=if There hadn’t been something wrong with the network所以主句用could have done，选A。考点：考查隐含的虚拟语气点评：有时，句子没有直接给出假设情况的条件，而须通过上下文或其他方式来判断。这题用了Otherwise，or代替if的虚拟语气，主句是1、表示与现 在事实相反的情况，主语+should/would/could/might+do：　2、表示与过去事实相反的情况，主句：主语+should/would/could/might+have done　3、表示对将来情况的主观推测，主句：主语+should/would/could/might+do。

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