I don't remember how many years ago _____ people began to grow crops.

[      ]

A. it was when

B. it was that

C. was it that

D. was it when

男性，23岁。大学生，自述不能见马路上的汽车，当汽车经过时总感觉汽车很可能撞上自己，因此十分恐惧，来心理门诊就诊，最好采用的方法是（）

A.系统脱敏

B.厌恶治疗

C.生物反馈

D.自由联想

E.梦的分析