My parents have made clear that they won’t support me in leaving school to open a company.
| A．it | B．one | C．this | D．what |
In January, 2004, the United States successfully launched “Spirit”, a Mars Exploration Rover, _____ a new milestone in the history of mankind.
| A．it marked | B．marking | C．marked | D．to mark |
____ he does his work, I don’t mind what time he arrives at the office.
| A．So far as | B．So long as | C．As far as | D．So as |
He is known _____ his being on time, so we don’t know the reason ____ his being late this time.
| A．for; of | B．as; for | C．for; for | D．of; of |
________ English will help to communicate _____ people from different countries in the world.
| A．Known; with | B．Knowing; with | C．To know; to | D．To know; in |
You should try to get a good night’s sleep ____ much work you have to do.
| A．however | B．no matter | C．although | D．whatever |