【小题1】My grandmother is already in her (ninety) but she still does exercise as much as po

问题补充：

【小题1】My grandmother is already in her (ninety), but she still does exercise as much as possible every day.

【小题2】---How is your business going? --- Oh, it couldn’t be (bad).

【小题3】No one bought a present for the twins, so they made (they) a model plane.

【小题4】The famous singer’s (arrive) made the fans rather excited.nineties

答案：

(答案→)nineties

解析：

【小题1】本题的含义为我的祖母已经九十多岁了，in one’s+整十的复数，表示表示几十几岁，故本题空格处填九十的复数形式nineties。

【小题2】本题的含义为你的生意如何，不可能更差了，故本题空格处填差的比较级worse。

【小题3】本题的含义为没有人为双胞胎买礼物，所以他们为了他们自己做了一个模型飞机，故本题空格处填他们自己的单词themselves。

【小题4】本题的含义为著名歌手的到达是粉丝们相当兴奋，故本题空格处填到达的名词形式arrival。