we are going to stay in ShangHai for_____ A a or two year B a year or twoA为何不可？
问题描述：
we are going to stay in ShangHai for_____ A a or two year B a year or two
A为何不可？
答
B
选A的话year要加s，因为它放在two后面嘛，B的话完整的是a year or two years
答
B
a year or two
答
B a year of two.
如果是A的话，应该是one or two years.
答
B
答
选B
a year or two 表示一两年的意思
例句：why do couples only last for about a year or two?
翻译：为什么婚姻生活只能维持一两年时间?
对于A 表达错误.