. --So hard __________ in the past few months that he has made great progress in English.

--I can see that, only a few mistakes he made in this exam.

A．he worked

B．did he work

C．he has worked

D．has he worked

心理测验选择的原则哪项错误

A．符合评估的目的

B．常模样本符合受试条件

C．标准化程度高

D．可以直接使用国外的测验工具

E．选择自己有使用经验的测验工具