听力原文:M: I wish I could get used to this American custom of using first names. W: I usually call just my good friends by their tint names. Q: What is the man complaining about? (17)
【简答题】Sales of CDs have greatly increased since the early 1990s, when people _______ to enjoy the advantages of this new technology. A.begin B.began C.have begun D.had begun