第16题: [单项选择]It is necessary that he______. [A] gives up trying [B] give up trying [C] would give up trying [D] is going to give up trying 参考答案:B 答案解析:[解析] 本题考查句型It is necessary (suggested,requested,ordered, proposed,important) 后面要加以that引导的虚拟从句,即that+