He requires that he an opportunity to explain his case.
A. is given
B. should give
C. give
D. be given
网友回答
A. is given
B. should give
C. give
(答案→)D. be given
解析：表示请求、建议、命令的动词（如require,demand,order,suggest)后接宾语从句时，从句中的谓语部分需要用虚拟语气should+do,其中should可省略。