Scientists think they have _____ in their attempt to find the causes of some major dieases.
| A．broken through | B．worked out |
| C．fallen out | D．got round |
All the teachers are well aware of the fact that most students, especially teens, need help and encouragement ______ punishment.
| A．better than | B．rather not | C．rather than | D．more often |
Now that you have accepted the task, the only thing you can do now is ______ on how to fulfill it.
| A．reflect | B．try | C．think | D．act |
Who ______ the fight against the H1N1 flu ______ it not been for the Chinese scientists’ great efforts?
| A．could have won; had | B．would win; had | C．would have won; has | D．could win; has |
Lots of coal miners died on the job last year, ______ the government to shut nearly 800 small mines in Shanxi Province alone.
| A．forced | B．to force | C．forces | D．forcing |
— Mom, can you give me an extra 200 yuan a month?
— Son, we have just bought a house, and from now on we need to practice strict ______.
| A．economy | B．medicine | C．self-control | D．patience |