问题补充：
(·高考四川卷)The airportnext year will help promote tourism in this area.
A. being completed
B. to be completed
C. completed
D. having been completed
答案：
A. being completed
B. to be completed
C. completed
D. having been completed
解析：选B。题干的意思是：明年竣工的飞机场将有助于促进该地旅游业的发展。complete与airport之间是动宾关系，又由题中的关键信息next year可知此处需用动词不定式的被动形式to be completed，表示将要发生的被动动作，所以B项符合题意。A项是现在分词的被动形式，表示正在进行的被动动作；C项是过去分词，表示已经完成的被动动作；D项是现在分词完成式的被动形式，表示已经完成的被动动作，三项均不合题意。
