【单选题】Sue wasn’t happy because she ______ the concert given by her favorite singer. 【 2017 广东】
【单选题】Sue wasn’t happy because she ___the concert given by her favorite singer.
【判断题】旧车市场模型可进一步简化,假设旧车质量只有一种类型。
【单选题】When the father bought the accordion, his son wasn’t happy because __________.
B.
he wanted a guitar or a piano
C.
he wasn’t allowed to play immediately
D.
his mother didn’t like it
【判断题】在旧车市场模型中,可以进一步简化,假设旧车质量只有一种类型。()