出可以填入空白处的最佳选项。） 1．mom bought me ______ mp3 for my birthday present last sunday. a. the b. an c. a d. 不填 2．---bob has gone to california. ---oh, can you tell me when he _________? a. has left b. is leaving c. would leave d. left 3．the singer became famous in the early 1980s, _____ the classical music was better than pop music. a. which b. when c. that d. where 4．i don’t think ______ possible to master a foreign language without much memory work.
