虚拟语气四六级练习题求解,

虚拟语气四六级练习题求解,
第一题
I don`t think it advisable that Tom ___ to the job since he has no experience.
A.is assigned B.will be assigned C.be assighed D.has been assigned
此题出在考虚拟语气的练习中让人费解.it明显是形宾,advisable是宾补,that...是宾语
就算是考虚拟语气也应该出成It is advisable that Tom be assighed to the job since he has no experience.求解ing...
第二题
I apologize if I ___ you,but I assure you it was unintentional.
A.offend B.had offended C.should have offended D.might have offended
这题如果选择B,从过主现混搭,那apologize前面应该加would/could/might才对呀?
第三题
I wish I ___ with her.
A.would be B.am C.was D.were
此题是不是存在歧义?个人认为选A或B都对
第四题
Everybody has arrived.It`s time we___the class.
A.shall start B.would start C.had start D.start
这题是不是考察虚拟语气,如果是难道不应该填started么?