题目：
选择题
What is the relationship between grammatical form and communicative function?
- A. one function can only be realized by one form.
- B. one form can only perform one function.
- C. one form can be used to perform a number of functions, while one function can also berealized by different forms.
- D. it is a kind of one-to-one correspondence.
答案：
<查看本题扣1积分>