1)works; 2)goes; 3)is; 4)opens; 5)sets; 6)arrives; 7)tidies; 8)comes; 9)takes; 10)finishes; 11)meets; 12)gets; 13)listens; 14)is; 15)gets.
1. Is The Mona Lisa a painting or an artist?
2. Who was The Mona Lisa painted by?
3. Is The Mona Lisa one of the most valuable paintings in the world?
4. Where is The Mona Lisa located today?
5. The most famous part of The Mona Lisa is her smile, isn't it?
1 have read
2 read
3 lived
4 returned
5 haven't heard
6 spent
7 have been
8 met
9 has been
10 was
11 has never seen
12 had
13 have never traveled
14 went
15 have just had breakfast