Refer the sentences to the Past Simple.                                                                                  Example:  She is my friend.  Last year she was my friend.                                                     1) I am happy now.  ___ Yesterday ______________________.   2) They are at school today.  __  Last week ______________________.   3) It is rainy in spring.  __ Last spring ___________.  4) It is sunny this summer. __  _______________________________________.  5) Tim and Bill are in Africa.  __  _____________________________.