By looking at a problem in as many ways as possible, creative thinkers can find solutions that would _______ remain invisible．
| A．otherwise | B．yet | C．already | D．forever |
Peter was disappointed to see the bike he had ________ went wrong again.
A. repaired B had repaired C. repair D. to repair
All the crew _______ were killed in that heavy storm.
| A．board | B．abroad | C．on board | D．on the board |
--- Did you see a man in black pass by just now ?
---- No, sir. I _________ a newspaper.
| A．read | B．was reading | C．would read | D．am reading |
________ of talking about the same problem over and over again, he suggested bringing the meeting to an end.
| A．Tiring | B．Tired | C．Having tired | D．Tiring himself |
When their first child was born, they _________ for three years.
| A．had married | B．had been married |
| C．got married | D．had got married |