WHAT HAVE FASHION DESIGNERS ... TO MODERNISE THE AO DAI

22. - 1000 CAU TRAC NGHIEM TIENG ANH ON THI THPT QUOC GIA CO DAP AN
1000 CAU TRAC NGHIEM TIENG ANH ON THI THPT QUOC GIA CO DAP AN

22. What have fashion designers ... to modernise the ao dai?

A. do

B. did

C. done

D. doing