Public service advertisements are often run _____ free, and are ______ to educate people about health, safety, or any other issue which affects public welfare.
| A．for, mean | B．for, meant | C．of, to mean | D．in, meaning |
There was a________look on his face when he met with the________problem.
| A．confusing；confusing | B．confused；confused |
| C．confusing；confused | D．confused；confusing |
You’d better go there by train.The train ticket is________the airplane ticket.
| A．as cheap three times as | B．as three times cheap as |
| C．three times cheaper than | D．cheaper three times than |
Do you know that _______ with wise men improves your mind?
| A．chat | B．chats | C．chatted | D．chatting |
When I said that some people are stupid I was not _______ you.
| A．talking to | B．referring to | C．turning to | D．listening to |
Professor Li, do you like Ewa and can you make a(n)_______ on her new movie?
| A．impression | B．bet | C．attack | D．comment |