Complete these sentences with the verbs in brackets in Past Perfect.
1. When he arrived I
(clean) the house already.
2. By six o´clock she
(finish) her homework.
3. Sandra called me at 2, but I
(leave) by then.
4. I was surprised when I met her. I
(not meet) anyone like her before.
5. How was your trip to Paris?
(be) there before?
6. If I
(know) the answer I would have passed the test.