who ( )your best friends?A.was B.were C.is D.isn't 使用单数还是复数?
问题描述:
who ( )your best friends?A.was B.were C.is D.isn't 使用单数还是复数?
答
who ( )your best friends?A.was B.were C.is D.isn't 使用单数还是复数?