The second runway of Hong Kong International Airport was officially on May 26,1990.
A. put into effect
B. made use of
C. taken notice of
D. put into use
网友回答
A. put into effect
B. made use of
C. taken notice of
(答案→)D. put into use
解析：put into use投入使用，启用；put into effect实行，实施；make use of利用，take notice of注意。