PSAs are often run _____ free, and are ______ to educate people about health, safety, or any other problem that affects public welfare.
| A．for, mean | B．for, meant | C．of, to mean | D．in, meaning |
35. It has been reported that the country's health-care reform is still _____ debate.
| A．in | B．on | C．under | D．Within |
34. By no means _____ of our students to drop out of school.
| A．will we allow | B．we will allow | C．we allow | D．must we allow |
33. — Can I help you?
— Do you have any of Michael Jackson's CDs ? I would like to buy _____.
| A．it | B．one | C．that | D．Those |
32. Tens of thousands of trees _____ in the area in the past few years.
| A．have been planted | B．were planted | C．have planted | D．had planted |
31. — I'm wondering why the visitors chose to stay with the host family.
— _____real local life.
| A．Experiencing | B．Experience | C．To experience | D．Having experienced |