以下关于字符串类型的操作的描述，错误的是：
A、strreplace(x,y)方法把字符串str中所有的x子串都替换成yC
暂无解析
We______theseminarsponsoredbyyouinSeptemberlastyear.
_______atallisworthdoingwell.
名词解释：privateinternationallaw
Wehavetopointoutthatthepostponementofthefulfillmentofthecontract______causeduscertainexpenses.
OneofthedisadvantagesintheGrammar-TranslationMethodisthatthetextsaretakenfrom_____,thelanguageofwhichdoesn'toftenmeetthepracticalneedsofthelearners.
