题目

Tom, you should remember to return the book to          name is on it. A．what        B．which       C．whosever         D．whose 答案：C16．把$\frac{4}{15}$和$\frac{5}{6}$化成分母是30，而大小不变的分数分别是$\frac{8}{30}$和$\frac{25}{30}$．