问题描述：
一道关于介词的英语选择题
we must________ the train being late for the reason that it always is.
a.allow for b.allow of c.allow on d.allow about.
书上的答案是allow on,自己有点怀疑是不是错了,根本就没有allow on这个短语,我自己选的是allow of.
we must________ the train being late for the reason that it always is.
a.allow for b.allow of c.allow on d.allow about.
书上的答案是allow on,自己有点怀疑是不是错了,根本就没有allow on这个短语,我自己选的是allow of.
问题解答：
我来补答展开全文阅读