Some of the exercises appear to be         ones that you have done，but after taking       second look，you will find that they are different.

    A. 不填；the         B. the；the          C. the；a          D. the；不填

第二部分 语言知识运用

第一节  单项填空（共15小题，每小题1分，满分15分）

     从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

21．Some of the exercises appear to be _____ones that you have done, but after taking____second look, you will find that they are different.

    A. /, the        B. the, the             C. the, a                D. /,  a

第二部分语言知识运用
第一节 单项填空（共15小题，每小题1分，满分15分）
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21．Some of the exercises appear to be _____ones that you have done, but after taking____second look, you will find that they are different.
A. /, the        B. the, the            C. the, a               D. /,  a