问题
选择题
The whole book ________ twelve units, ________ two that are mainly for revision.
A．contains; including
B．includes; containing
C．contains; containing
D．includes; including
答案
答案：A
contain一般“包含”得是一个整体，侧重“内有”的意思；include往往包含的是整体的一个部分或几个部分，including在这里是介词。依题意A为最佳选项。