They ______arrive at the station before 10 o'clock, but they

They ______arrive at the station before 10 o'clock, but they don't qppear now . a .are supposed to b. were supposed to .应该选a 还是b.这里存在虚拟语气的问题吗?

TUUDG 1年前已收到1个回答举报

叶月花朵

共回答了16个问题采纳率：87.5% 举报

1、表示与现在事实相反的情况：
从句：If 主语+过去时(Be动词用were)
主句：主语+should/would/could/might+do：
所以要选B.

1年前

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