tolong dinawab no 1-20 mohon bantuannya

1. i have gone to the library today
2.you have kept a pet for three years
3. have you come here before ?
4.has it rained all day ?
5.who have we forgotten to invite ?
6.we have not heard that song already
7.he has not forgotten his books
8.she has stolen all the chocolate
9.i have explained it well
10.who has he met recently ?
11.how have we finished already ?
12.he has studied latin
13.i have known him for three months
14.where have you studied arabic ?
15.what countries have they visited in europe ?
16.he has hurt his leg
17.she has left her phone in the taxi
18.we have not lost our tickets
19.has she called her mother ?
20.has he taken a taxi ?

^-^