Dogs have a very good ______ of smell and are often used to search for survivors in an earthquake.
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.
28. A heavy snow promises a good harvest, _____ is often the case.