When ____ ,the new stadium will hold 50,000 people .A complete B _英语解答

When ____ ,the new stadium will hold 50,000 people .
A complete B to complete C completing D completed

人气：107 ℃　时间：2019-10-11 16:55:41

解答

D
因为主语是the new stadium ,意思是当新体育馆被建成后,能容纳50000人,体育馆是被建的,用被动