【题目】Beijing’s new international airport into operation in 2019 will serve 72 million passengers annually.
A. being put B. to be put
C. put D. to put
在线课程【答案】B
【解析】考查动词不定式。句意：北京将于2019年投入运营的新国际机场每年将为7200万乘客提供服务。此处表示将来，所以用动词不定式做后置定语，airport和put之间是被动关系，故用动词不定式一般式的被动式做后置定语，答案为B。