Question

--Do you know Huang Ting well?

--Yes. She and I _______ friends since we met in Wuhan last summer.

1. A.
   have made
2. B.
   were
3. C.
   have been
4. D.
   become

Answer 1

C
此题考查现在完成时态。since“自……以来”，常用于现在完成时态，make与become为非延续性动词，故选C项。