I don’t think it advisable that Tom _A____ to the job since he has no experience.A.be assigned B.is assigned C.will be assigned D.has been assigned请高手讲解下其中的语法知识,再翻译下这句话.为什么要选A啊?

I don’t think it advisable that Tom _A____ to the job since he has no experience.A.be assigned B.is assigned C.will be assigned D.has been assigned请高手讲解下其中的语法知识,再翻译下这句话.为什么要选A啊?
I don’t think it advisable that Tom _A____ to the job since he has no experience.
A.be assigned B.is assigned C.will be assigned D.has been assigned
请高手讲解下其中的语法知识,再翻译下这句话.为什么要选A啊?

I don’t think it advisable that Tom _A____ to the job since he has no experience.A.be assigned B.is assigned C.will be assigned D.has been assigned请高手讲解下其中的语法知识,再翻译下这句话.为什么要选A啊?
advisable 后面要用虚拟语气 原句应该是...Tom should be assigned to the job...
但是should 可以省略,也就是A选项
至于其中涉及的语法,主要就是虚拟语气的一些标志词
动词的话你知道的,如suggest advise insist等等不赘述了
说一下形容词,一种是上述动词的形容词,有“可取的,适合的”意思,如advisable就是advise的形容词,又如insistent等等,还有一种是特殊的,表语气的形容词,有“重要的,必要的”如important necessary 或者“惊讶,奇怪”如strange 或者“自然的”如natural
记住以上特例,如果虚拟语气完全不明白,建议还是买本语法书,仔细地学习
这句话的意思是：我不认为tom应该被分配去做这项工作,因为他没有经验