来自李貌的问题
Thefirsttextbooks______forteachingEnglishasaforeignlanguagecameoutinth16thcenturyAhavingBtobewrittenCbeingwrittenDwritten
Thefirsttextbooks______forteachingEnglishasaforeignlanguagecameoutinth16thcentury
AhavingBtobewrittenCbeingwrittenDwritten

