来自田玉平的问题
WeallknowthatdoingsportsisgoodforourhealthWeallknowthat____sports__goodforourhealth答案是doing和is那为什么要填doing和is呢?
Weallknowthatdoingsportsisgoodforourhealth
Weallknowthat____sports__goodforourhealth
答案是doing和is
那为什么要填doing和is呢?

