来自廖恒成的问题
【---ItraveledtoAfricalastsummerandIsawalotofwildanimals．---____________unforgettableexperienceyouhad!（）A.WhataB.HowC.WhatanD.What】
---I traveled to Africa last summer and I saw a lot of wild animals．
---____________ unforgettable experience you had!（）
A.What a
B.How
C.What an
D.What
