Question

we are going to stay in ShangHai for_____ A a or two year B a year or two

请给予解释，A为何不可？

Answer 1

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

Answer 2

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。

Answer 3

B a year of two.
如果是A的话，应该是one or two years.

Answer 4

B
a year or two

Answer 5

B