She didn’t write to him until she received his let...

Câu hỏi: She didn’t write to him until she received his letter. 

A It was not until she received his letter that she wrote to him.  

B It was not until she received his letter which she wrote to him.  

C It was not until she writes to him that she received his letter.  

D It was not until she receives his letter that she writes to him.