Most of the professors _____ to our school were from South Africa．
| A．invited | B．to be invited | C．being invited | D．had been invited |
The country has already sent up three unmanned spacecraft，the most recent ________ at the end of last March.
| A．has been launched | B．having been launched |
| C．being launched | D．to be launched |
The children went home from the grammar school，their lessons ________ for the day.
| A．finishing | B．finished |
| C．had finished | D．were finished |
—Come on，please give me some ideas about the project.
—Sorry.With so much work ________ my mind，I almost break down.
| A．filled | B．filling | C．to fill | D．being filled |
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 |