29. Instead of leading us a hand, he just stood by, __________________us when we were in trouble.
33.— Can I help you? — Do you have any of Michael Jackson's CDs ? I would like to buy _____.
32.Tens of thousands of trees _____ in the area in the past few years.
31.— I'm wondering why the visitors chose to stay with the host family. — _____real local life.
30.How long do you think it will be _____ we can find a new water source?
29.High up in the mountains _____ a quiet small village, with only 20 households.