几道情态动词和虚拟语气的题

几道情态动词和虚拟语气的题
1.If you're careful,you_____get into even worse trouble.
A.need B.can C.could D.must
2.____for the fact that his father is general manager of the company,he would never get the job.
A.Had it not been B.Were it not C.Hand not it been D.Were not it
3.---I sitll haven't thanked Aunt Lucy for her present.
----It's time you ____
A.do B.did C.had D.would
4.----The research on the new bird flu virus vaccine is challenging and demanding .Who do you think can do the job?
----_____my student have a try?
A.Shall B.Must C.Will D.May
5.Regulations require _____needs special diets ____the cooking manager in advance.
A.who;informs B.whom ; informed C.whomever;inform D.whoever';inform