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。
21．I feel ________ when some people say geography is ________ and difficult to learn.
A．confused；confused B．confusing；confusing
C．confused；confusing D．confusing；confused
22．Some languages，________ Russian and German，are not easy to learn.
A．for example B．such as
C．included
