选择填空:The rest of the students -------- not allowed to leave the classroom at that time.A areB isC wasD were

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选择填空:The rest of the students -------- not allowed to leave the classroom at that time.A areB isC wasD were

选择填空:The rest of the students -------- not allowed to leave the classroom at that time.A areB isC wasD were
选择填空:The rest of the students -------- not allowed to leave the classroom at that time.
A are
B is
C was
D were

选择填空:The rest of the students -------- not allowed to leave the classroom at that time.A areB isC wasD were
选择D,第一,关键词the rest of the students 说明主语是复数,故可以排除B与C,因为B和C主语要求都是单数,或者主语是作为一个整体时,明显这里指的是剩下的那群学生,故用复数,剩下的是are与were,楼主请看at that time,在那时,说明时间已经过去了,所以很明显,谓语要用过去时,整句话的意思是(在那时,剩下的学生都被要求就在教室里,也就是不让离开教室)
不知道楼主懂了没,不懂再补充下哪里还没有清楚的,

D
首先讲为什么用复数,rest ,half, 百分数等的谓语动词取决于后面的中心名词的数,这里剩下的学生仍然不止一个所以用复数,再就是后面有at that time ,在那时,是过去的

D
The rest of the students 仍表示复数
at that time.表示过去时

d 主语是复数,at that time过去时

D were 首先at that time那个时候表明用过去式,The rest of the students 主语为复数