—Has Maria arrived yet?—No, she ______ an hour ago.

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问题 —Has Maria arrived yet?—No, she ______ an hour ago.

选项 A、was supposed to come
B、ought to have come
C、should come
D、must have come

答案B

解析根据本句句意：Maria到了吗?没有，她原本应该一个小时前就到的。可知，此句应用虚拟语气。故可排除其他三项，答案为B。

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