行为治疗的基本理论不包括（）
A.经典条件反射
B.操作条件反射
C.学习理论
D.自由联想
E.强化理论
参考答案：D
I received an invitation to dinner from my friend，and with my work ，I gladly accepted it.
A．was finished
B．finishing
C．having finished
D．finished
