【选 C】句子要求所填的词符合"动词+ sb. + to sth."的结构，而这正是 entitle 的用法。 【entitle】sb.to sth. 意为"给…权利;给…资格"，相当于 give（someone）the right to do sth.or have sth.。 全句的意思是：凭这张券你可在我们的新餐厅免费就餐一次。
【give】意为"交给"，用于 give sb.sth. 或 give sth.to sb. 的结构。
【grant】意为"同意;准予;授予"，相当于 give sb.sth.that he has asked for，如 grant a request 答应请求; She was finally granted an exit visa. 她终于得到了出境签证。 grant a scholarship to a student授予学生奖学金。
【credit】意为"信任、相信"，如 He could not credit her explanation.他不能相信她的解释; credit sth.to...，意为"把…归于"，如 The crash was credited to pilot error.这次失事是飞行员操纵失误引起的; credit sb.with sth.的结构，意为"认为…有（某种优点或成就）"，如 They credited him with the discovery.人们认为这一发现是他的功劳。