Most whales must come up for air after several minutes, _______ a few can stay under water for an hour or more.
| A．while | B．or | C．for | D．so |
——Hi, Steve, you look tired.
——I am tired. I ______ the living room all the afternoon.
| A．painted | B．had painted | C．have been painting | D．have painted |
________by the beauty of the West Lake, Mary decided to stay for two more days in Hangzhou.
| A．Attracting | B．To be attracted | C．Attracted | D．Having attracted |
Go and see her whenever _____.
| A．it will be convenient to you | B．you will be convenient |
| C．it is convenient to you | D．you are convenient |
Having won the first place in the English examination, Tom ran back home, .
| A．happy and excited | B．happily and excited |
| C．happily and excitedly | D．happy and excitedly |
After _______ seemed half an hour, the teacher gave us the correct answer.
| A．what | B．that | C．which | D．it |