must 的意思为“肯定”.
不一定,在句中,只是‘我’在猜测.
Tom didn't at school today,he____be ill.
Tom didn't at school today,he____be ill.
为什么是must?
难道没来学校就一定是生病了吗？
为什么是must?
难道没来学校就一定是生病了吗？
英语人气：453 ℃时间：2019-11-15 17:37:04
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