来自孙君顶的问题
-HowwasyourvoluntaryworkinAfrica？--Oh，amazingexperience!I'llneverforgetit!（）A.whatB.whatanC.howD.howan
-How was your voluntary work in Africa？
--Oh， amazing experience!I'll never forget it!（）
A.what
B.what an
C.how
D.how an
