－So hard   in the past few months that he has got an A in the Mid－term English Exam.

－I can see that only a few students   for it.

A．has he worked; has the teacher praised.

B．has he worked; the teacher has praised.

C．he has worked; the teacher has praised.

D．did he work; has the teacher praised.

PIMS项目研究对象是各公司中的战略经营单位。因此，PIMS项目的数据库是关于这些战略经营单位情况的大汇总。当时，PIMS数据库采集了3000多个经营单位4-8年的信息资料。对每一经营单位所收集的信息条目多达300多项，它们可归为下列几大类，如：经营单位环境的特性；经营单位的竞争地位；生产过程的结构；可支配的预算分配方式和（）。

A.经营单位的内部能力

B.经营单位的市场表现

C.经营单位所在的产业特征

D.经营单位业绩