use the present perfect in these sentences
1) mary (lose) the key
2) we (enter the library
3) they (find) the information for their poster
4) tom and andrew (write) the article for the magazine
5) john (built) the house
6) we read the books about cars
7) mary (come )to the party
8) i (bring) the present for my sister
(СРОЧНО! ДАЮ 20 БАЛЛОВ!!)

1) mary has lost the key

2) we have entered the library

3) they have found the information for their poster

4) tom and andrew have written the article for the magazine

5) john has built the house  

6) we have read the books about cars

7) mary has come to the party

8) i have brought the present for my sister