几道英语单选题. 1 ____will Mr. Forbes be able to regain control of

几道英语单选题. 1 ____will Mr. Forbes be able to regain control of the company.
A Only if the works hardly B Only with hard work(请解释一下A为什么不对)
2 As___clear from his manners,he is a teacher.
A being B is(为何不选A,以及B 的理由)
3 I believe that remark ____from what you said yesterday.
A came B originated.(要求同第二题)
答得好的追加分数,谢谢