People now have to find as many ways as possible_______they can solve the problem of pollution.（Which is wrong?）
| A．that | B．by which | C．/ | D．in which |
Who is __________ to be the best footballer this year still depends.
| A．likely |
| B．certain |
| C．possible |
| D．probable |
We were in __________ when we left that we forgot the airline tickets.
| A．a rush so anxious |
| B．a such anxious rush |
| C．so an anxious rush |
| D．such an anxious rush |
All these gifts must be mailed immediately __________ on time for Christmas.
| A．in order to have received |
| B．in order to receive |
| C．so as to be received |
| D．so as to be receiving |
—I'm wondering why the visitors chose to stay with the local family.
—__________ real local life.
| A．Experiencing |
| B．Experience |
| C．To experience |
| D．Having experienced |
__________ the project on time, the staff were working at weekends.
| A．Completing |
| B．Having completed |
| C．To have completed |
| D．To complete |