To succeed in a difficult task ,______________.
| A．Persistence is needed | B．Persistence is what you need |
| C．One needs to be persistent | D．A persistent nature is needed |
Jumping out of _______ train running at a speed of 200 kilometers per hour is quite _____ dangerous practice.
| A．/; the | B．/; a | C．a; a | D．the; the |
---Are you satisfied with what the captain explained?
---Not at all. It couldn’t have been________.
| A．so bad | B．worse | C．the worst | D．the best |
In the USA, Columbus Day is_______ the _____ of Christopher Columbus in the New World.
| A．in the memory of; arrival | B．in memory of; arrival |
| C．in the memory of; arriving | D．in memory of; arriving |
According to the police, _______ some facts undiscovered.
| A．it seems that | B．it seems to be | C．there seem to be | D．here seem |
Recent pressure at work may________ his behavior.
A.accounts for B. pay for C. stand for D leave for