English Sentences Correctional Issues

Correctional issues student date. Are becoming become have become. Is talking was talking talked. Have gone / went / had gone. Closed had closed / has closed. Have been discussing had been discussing / were discussing discussed. Has completed had completed completed. Will probably see will have seen will have been seeing. Will be studying will study will have studied. Have been studying / will have been studying will study. Will have completed / will complete complete. Arranged / have arranged / are arranging. Did you sign have you signed had you signed. What is the difference ? All these sentences are wrong , correct them.

They about integrated studies for hours when they stopped for a rest. (have been discussing/had been discussing/ were discussing/discussed);

The student said he his individual assignment. (has completed/had completed/completed);

What are you thinking about? – My Erasmus+ abroad. This time next week I in Spain. (will be studying/will study/will have studied);

The conference finishes at 4 pm. – O key, I my report by then. (will have completed/ will complete/complete);

It‘s the fifth time we the international conference at our college. (arranged/ have arranged/ are arranging);

It‘ the easiest subject course I .(have ever learnt/learnt/am learning);

the learning contract? (did you sign/have you signed/had you signed;

When my neighbours (to get) home, they (to realise) that someone (to rob) their house;

When my neighbours got home, they realised that someone had robbed their house.

What is the difference? I am meeting Jim at six and I will meet Jim at six;

When did he work as a laboratory assistant?

Tell me, what have you been doing when I phoned?