Ответ:

1. The lawyer has send the letter a week ago

2.she has never met her cousins from Australia

3.i have already heard Beyonce's latest hit

4. when has he joined the football team?

5. The class hasn't finished the test yet

6. i haven't get enough slept last night

7. we haven't go to a concert recently

8.The baby has just began to walk

9.i haven't watched the news last night

10.Dina has went recently

11. When has the guests arrive?