We have been in Chinathree years. We like it very much.A. in B. since C. for

问题补充：

We have been in Chinathree years. We like it very much.

A. in B. since C. for

答案：

解析： 本题的含义是我们在中国呆了有3年的时间了，for连接时间长度，故本题选C。