Jean Wangers most enduring contribution to the study of Afro-American poetry is his insistence that it______in a religious, as well as worldly, frame. of reference. A．is to be analyzed B．has been analyzed C．be analyzed D．should have been analyzed
A. A．is B.has C.be D.should
【参考答案】
C 句中that引导的从句作insistence的同位语，insistence要求其所接从句中的动词必须用原形或......