龚*
短语是be good/best at doing sth. the tech industry is best at being optimistic about itself是个完整的句子，不缺少宾语成分?
[相关题目] 51. The tech industry expo, which attracted more than 180.000 people was a reminder of ______ the tech industry is best at being optimistic about itself.
2020-12-14 22:26:39
杨*
老师
回答于 2020-12-16 10:33:56
同学你好，本题应该是上传的时候出现格式问题，原题应为在best at后面有一个冒号，即The tech industry expo, which attracted more than 180.000 people was a reminder of ______ the tech industry is best at： being optimistic about itself. 这样的话从句缺乏宾语，故选what。
