ответ: a) will have tea, will be leading, will be built, will live.
b) would repair, shall visit, would see, should invite
Объяснение: future indefinite пишется в форме will+verb(1 form), а future in the past в форме would/should/shall+verb.
the Future Indefinite Tense:
will have tea
will be built
shall visit
will live
the Future-in-the-Past Tense:
would repair
would see
should invite