— You were out when I dropped in at your house.
— Oh, I _______ for a friend from England at the airport.
| A．was waiting | B．had waited | C．am waiting | D．have waited |
________ an hour every day has made a considerable difference to my health.
| A．Having walked | B．Walk |
| C．Walking | D．Walked |
Be careful，for the delicate glass ________ easily.
| A．is broken | B．breaks |
| C．will break | D．has broken |
—Mo Yan was awarded the Nobel Prize for Literature.
—He certainly ________ that honor，for his works are so popular.
| A．reserves | B．deserves |
| C．observes | D．respects |
—Can a person enjoy the pleasure from his work?
—________ he can have his interests and the work combined.
| A．Although | B．Since |
| C．While | D．Unless |
The mother，________ in the kitchen，totally forgot the medicine on the table within the child’s reach.
| A．to be occupied | B．occupied |
| C．occupying | D．being occupied |