I will do all I can ___(learn)physics and chemistrywell this term.为什么用TO LEARN

I am sure that I will do all what I can to do love you All I can do is As your good friend,I will do ________ help you.A.that I can to B.what I can toC.all that I can D.what I can How can I learn to give up?I would like to forget somethings.But I can not do it.While I try to do.I will remember all the things which I do not remember.How can I do? I will do all for u I will do all( ) I can do to help others.应填哪个词that 还是what? I will do all that I can to help you 这个句子中that 做什I will do all that I can to help you这个句子中that 做什么成分?为什么can后要加to? anna -------[promise ]to do all the can to help us and I belive she will if i can do anything,the number i will do I will do all I can ___(learn)physics and chemistrywell this term.为什么用TO LEARN If I can get the job,I'll do all I can do it well改错 IF I CAN I WILL DO IT WELL! Will I forget you,I can't do I will do anything that I can是什么句式 As long As I can,I will do! I will do what I can _____ you with Chinese. I must do it !I can do it !I will do it !什么意思 do all what I will tell you to do如何修改能否改成do all that I will tell you