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thepolicemandeclaredthattheblowonthevictim'shead----formbehindamusthavebeenmadeboughttohavebeenmadecwouldhavebeenmadedshouldhavebeenmade写出原因

题目详情
the policeman declared that the blow on the victim's head----form behind
a must have been made
b ought to have been made
cwould have been made
d should have been made
写出原因
▼优质解答
答案和解析
A must have been made, must have +动词的过去分词,用于肯定句,表示对过去情况的肯定推测,意思是一定、必定