73.Tom ___ the party as no one saw him there yesterday evening

问题描述:

73.Tom ___ the party as no one saw him there yesterday evening
A.can't attend
B.mustn't attend
C.won't have attended
D.couldn't have attend
请说下考点及解题思路,其他答案为什么不行?

D
这是情态动词加完成时表示对过去的推测
首先是对过去的推测,排除AB,表推测是没有mustn't的用法的
tom(昨天)不可能在宴会上,因为昨天晚上没人看到他在那里