I'll have done it ... the time you arrive. a) –, b) at, c) in, d) by ​

I'll have done it at the time you arrive.

I'll have done it by the time you arrive.

a)this is a cap. the cap is black b)my friend is ann. либо же вы предложение не дописали в b)c)write qestion on the blackboard, please. d)my adress is pushkin street,10 e)i want to visit the usa f)my father is doktor smith