Charles Babbage is generally considered______-the first computer.
| A．to invent | B．inventing | C．to have invented | D．having invented |
The time Dr. Wang has devoted _____ the disabled in the past five years is now considered_____of great value.
| A．helping; being | B．helps; to be | C．to helping; to be | D．to helping; being |
-----Are you sure that the party came to ______ power in ______1960s?
-----Yes.
| A．the, the | B．/, the | C．a, the | D．the, / |
Once new difficulties _____ in our new job, we should learn to use our brains to solve them.
| A．rise | B．cause | C．arise | D．raise |
He has written a book_______I have forgotten.
| A．which name | B． which of name | C．whose name | D．the name of whose |
This is the best chance for you to go abroad. Don't ________.
| A．throw it away | B．put it away | C．take it away | D．hide it away |