Mr. Wang, who is said to have immigrated to the USA, __ at No.2 Middle School in our city for twenty years.

A．has been teaching

B．was teaching

C．taught

D．has taught

一般来讲，听众的心理定势类型有三种，分别是肯定相容型、否定相斥型和（）。

A.冷静客观型

B.感情丰富型

C.中庸淡漠型

D.心潮澎湃型