John received an invitation to dinner，and with his work ________，he gladly accepted it.
| A．finished | B．finishing |
| C．having finished | D．was finished |
________ as the “first lady of speech”，Dr, Lillian Glass is recognized as one of the world's leading experts on communication skills.
| A．Knowing | B．Having known |
| C．Known | D．To be known |
—Why do you look sad?
—There are so many problems ________.
| A．remaining to settle | B．remained settling |
| C．remaining to be settled | D．remained to be settled |
A few days after the interview，I recevied a letter ________ me admission to the university.
| A．offering | B．offered |
| C．having offered | D．to be offered |
—We didn't find the Blacks ________ the lecture.
—No one had told him about ________ a lecture the following day.
| A．to attend；there to be | B．attending；there being |
| C．attended；there be | D．attend；there was |