____ four years since I joined the Army.A. There was B. There is C. It was D. It is为什么选d不能选c啊?
问题描述：
____ four years since I joined the Army.
A. There was B. There is C. It was D. It is
为什么选d不能选c啊?
答
自从我参军到现在有四年了。
到现在 是表示现在呀，没有过去的意思，所以是it is
答
B
从我参军直到现在,已经有四年了
是要表达"有4年"的意思
而不是"是4年"
如果是选C,D,则表示成'It is the 4th year since..."
说这句话时要选择一般现在时
答
是C答案错了
答
since 前边用一般现在时
答
It is sometime since
自从..以来已经多长时间了
答
不是 应该是 it has been 吗