---I’m going to Hangzhou for a holiday this weekend.
--- ___ you are there, could you buy me some green tea?

---I’m going to Hangzhou for a holiday this weekend.

--- ___ you are there, could you buy me some green tea?

A. Because B. While C. During D. As

--- I'm going to Hangzhou for a holiday this weekend.

--- ________ you are there, could you buy me some green tea?

1. A.
   Because
2. B.
   While
3. C.
   After
4. D.
   Though