He was puzzled by this phenomenon. He began to try every approach _________ the best way of working it out.
| A．known to find | B．knowing to find | C．known finding | D．knowing finding |
Mike didn’t notice Alice entering his room. He __________ a phone call.
| A．answered | B．has answered | C．was answering | D．is answering |
This novel is set in the modern city, San Francisco, so once _______, it will be very popular.
| A．publishes | B．having published | C．publishing | D．published |
The pretty young woman is now experiencing a whole new world that is incredibly awkward _________ there is true love, happiness and care.
| A．when | B．where | C．how | D．that |
－What are you going to do this afternoon?
－I’ll probably go for a walk later on __________ it stays fine.
| A．as far as | B．so long as | C．even if | D．as though |
－I enjoyed the food very much.
－I’m glad you like it. Please drop in any time you like.
－____________.
| A．Is it all right? | B．I’m afraid I won’t be free. |
| C．Yes, I will. | D．That’s great. |