THINGS ……….. GREATLY SINCE WE ……….. DOI MOI POLICY.A. HAVE CHANGED...

51. - DE DAP AN THI THU DH
Tiếng Anh DE DAP AN THI THU DH

51.

Things ……….. greatly since we ……….. Doi Moi policy.

A. have changed / have had

B. changed / has had

C. have changed / had

D. changed / had