托业考试

试题来源：托业-1
【单选题】 Since 1990, our customers ______with our service.
A．(A) are satisfied
B．(B) have satisfied
C．(C) have been satisfying
D．(D) have been satisfied

参考答案：D
网考网解析：
Have been satisfied is the passive form of the present perfect tense, which indicates an action that started in the past and continues to the present... 查看试题解析出处>>