In an amusement park you can ______yourself with a variety of facilities, ranging from trolley buses to roller coasters.
32. Premier Wen Jiabao has many important ______ of state to deal with.
31. They had a desire that I______ their wedding.
30. They appeared ____ me, so I had to explain to them.
29. The _____ of freshwater brought about a lot of difficulties for those living on the island.
28. The Chairman thought ______ necessary _____ Professor Smith to speak at the meeting.