Грамматические упражнения по английскому языку "Present Perfect Tense"

Упражнение . В письме есть 4 ошибки на использование  for и since.  Найдите и исправьте их. These are some sentences from Nigel’s letter home from Africa. He has made four mistakes in using ‘for’ and ‘since’. Correct his mistakes.

Dear Mum and Dad,

I've lived in Africa since two weeks and I love it! Africa is beautiful! I haven’t travelled to any faraway place for last summer. I’m so happy now!

I’ve already seen Mr. Rambler. He is working for WWF here and taking photos of wild animals. I haven’t seen any lions yet. I think I’ll see them later.

Thank you for the trip. I’ve dreamed of Kenya for my childhood. I haven’t seen you since ages! I miss you so much!

Love, Nigel.

Ответы

1.      for two weeks

2.      since last summer

3.      since my childhood

4.      for ages