Present perfect tense They (be) in a Zoo. 
 __ you ever (visit) a Wild Animals’ park? 
 My Granny (not/cook) a birthday cake yet. 
 Scientists (save) many endangered animals. 
 Father (already/ repair) the parrot’s cage 
 The sharks (fight) for food at feeding time. 
 I (never/see) the giant panda. 
 He (never/be) in London