您正在看的高中三年级是:非谓语动词（2）。

　　It is not uncommon for there to be problems of communication between old and young.

　　老人与年青人之间存在着沟通问题是很常见的。

　　_________________________on campus is a great convenience to female teachers.

　　校园内有儿园对女教师十分方便。