A direct air route Chongqing and San Francisco is expected to open next month．
A. linking
B. being linked
C. link
D. linked
网友回答
(答案→)A. linking
B. being linked
C. link
D. linked
解析：句意：重庆到旧金山的直达航线预计下个月开航。动作link与其逻辑主语A direct air route是主动关系，故用现在分词作定语，选A。