初三英语,在线等,要原因. -Susan stays alone in the classroom初三英语,在线等,要原因.-Susan stays alone in the classroom and looks sad.-_________ to her?A what happensB what has happenedC what is happeningD what was happening

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初三英语,在线等,要原因. -Susan stays alone in the classroom初三英语,在线等,要原因.-Susan stays alone in the classroom and looks sad.-_________ to her?A what happensB what has happenedC what is happeningD what was happening
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初三英语,在线等,要原因. -Susan stays alone in the classroom初三英语,在线等,要原因.-Susan stays alone in the classroom and looks sad.-_________ to her?A what happensB what has happenedC what is happeningD what was happening
初三英语,在线等,要原因. -Susan stays alone in the classroom
初三英语,在线等,要原因.
-Susan stays alone in the classroom and looks sad.
-_________ to her?
A what happens
B what has happened
C what is happening
D what was happening

初三英语,在线等,要原因. -Susan stays alone in the classroom初三英语,在线等,要原因.-Susan stays alone in the classroom and looks sad.-_________ to her?A what happensB what has happenedC what is happeningD what was happening
B
表示过去的事情对现在有一定的影响,用现在完成时.