来自乔静的问题
Robertisgoodatlanguages,___weallknowAbecauseBforCasDsinceChinaisadevelopingcountry,__weallknowAasBforCsinceDbeause我选的都是as
Robertisgoodatlanguages,___weallknow
AbecauseBforCasDsince
Chinaisadevelopingcountry,__weallknow
AasBforCsinceDbeause
我选的都是as

