Перевести правильно на язык. сейчас я в гостинице. в два часа у меня назначена встреча с другими представителями вашей фирмы. думаю, в четыре часа я буду свободен. вам удобно в это время?

I`m in the hotel now. i`ve got meeting with other delegates of your firm. i suppose i`ll be free at four o`clock. is it convenient for you?

Now i am at hotel. at 2 o`clock i have a meet with other representatives of your company. think, that at 4 o`clock i will be free. is it comfortable for you?

The telegram came some minutes after he had left. (past) – все ок! how many pages you will have read by 5 o'clock tomorrow? (future) – глагол will в вопросе стоит перед подлежащим. правильный ответ: how many pages will you have read by 5 o'clock tomorrow? the children already has decided what to do with the books. (present) – нужно использовать глагол   have ( т.к. children – это мн. число) и already стоит между  have и  decided,   правильный ответ: the children   have already decided what to do with the books. i have been waiting for you since two o'clock. - present by the time he arrives in london, john will have been driving for 5 hours. – здесь  future к тому времени как он приедет в лондон, джон будет вести машину уже   5 часов. he had a backache. he had been digging the garden. – здесь past у него были боли в спине. он копал огород.