英语问题,明天考试,请快点回答,谢谢

英语问题,明天考试,请快点回答,谢谢
①The job is（ ）for me ( )
A.enough difficult , to do B.too difficult ,to do C.too difficult ,to do it
答案是B,但我不明白,C为什么不能选?
②If you have lunch at school , （　）
A. so will I B.so do I C.I have too D.would go
答案是B,我选的是A,不是主句将来从句现在吗?if引导的是从句啊
③—If you want a better grade, you ( ) watch TV too much.
__But I only watch TV on weekends.
A. can B. should C. shouldn't D. won't
答案是C,我选的是D,理由同上
④I think there ( ) robots working for us in the future.
A. will be B. will have C. is going to be D.are going to have
答案是A,我选的是C,A是客观的,句子的意思不是主观的吗?不选C吗?
各位大神帮帮忙吧,明天考试的孩子伤不起啊啊啊!