________ the program，they have to stay there for another two weeks.
| A．Not completing | B．Not completed |
| C．Not having completed | D．Having not completed |
I ‘m the first____ I might be wrong.
| A．to admit | B．admit | C．of admiting | D．for admitting |
Though she did not know Boston well, she made her way_____to the Home Circle Building.
| A．easy enough | B．enough easy | C．easily enough | D．enough easily |
---I went to see my friends off at the airport.
---Is that_____you were late for the important meeting?
| A．because | B．why | C．how | D．reason |
Mary is crazy _______ playing the piano.
| A．at | B．in | C．about | D．of |
It is______ these stories can amuse her.
| A．sure | B．surely | C．certain | D．eager |