Question

срочно,пожалуйста)
заранее спасибо!!!!

Answer 1

1 The lesson hasn't started yet.
2the teacher has already writen on the board.
3 Joe and Tim have just come into the classroom.
 4 Tom hasn't finished getting books ready.
5 Christine has already opened the book.
Dave has dropped a pen on the floor.
6 He hasn't picked it up yet.