Complete the sentences using the words in brackets. Remember – all the sentences have to be in present perfect. Use full verb forms.

1.  They [ ] the opera. (to visit)

2.  We [ ] our rucksacks. (already/to pack)

3.  I [ ] my room. (just/to clean)

4.  They [ ] to a disco. (to go)

5.  My father [ ] the keys, so he can't open the door. (to lose)