Change the following sentences into the passive:
1) When will they pull this old buiding down?
2)Why didin't you invite Kate to they party last month?
3) Her parents always encourage her to focus on the study.
4) The sudden flood damaged our crops.
5) Will you phone her when she comes to London?
6) Who wrote "Gullivers's Travels"?
7) Was Marry reading a magazine when her mother phoned?\
8) They cancelled all flights because of fog.
9) Farmers cut rice during the harvest.
10) We have waited for the dentist for 2 hours.
11) He threw his second-hand cassette recorder away.
12) They didn't look after the baby properly.