some of the schools in shanghai have moved one step closer to ______with the global education commun

some of the schools in shanghai have moved one step closer to ______with the global education community through the internet

答案是being connected
怎么不是connecting

connect A with B ，用A连接B
如果使用ing形式这个句子句缺少A
要是ed形式的话，就使用了被动语语态，A就可以用To以前所说的事儿代替咯

你好！ 因为主语some of the schools 和the global education community 之间是被动关系，一些学校和全球教育系统是被联系起来的。 仅代表个人观点，不喜勿喷，谢谢。