We have been here for_____.A two and a half months B two and half_英语解答

We have been here for_____.A two and a half months B two and half a month C two and a half month
选哪个?为什么?为什么其他不行?

人气：257 ℃　时间：2020-02-03 17:52:35

解答

A.
B的 half a month 单独用是可以的 ,可是这里前面有个two,所以是错的
C.两个半月是复数,所以month不正确