Every possible means ___ to prevent the air pollution, but the sky is still not clear．
| A．is used | B．are used | C．has been used | D．have been used |
—Have you finished reading Jane Eyre?
—No，I ________my homework all day yesterday.
| A．was doing | B．would do |
| C．had done | D．do |
The last one ________pays the meal.
| A．arrived | B．arrives | C．to arrive | D．arriving |
She devoted herself ________to her research and it earned her a good reputation in her field.
| A．strongly | B．extremely | C．entirely | D．freely |
I have to go on，________difficulties I will meet.
| A．whatever | B．however | C．whoever | D．what |
After all the harm she has been done, she ________whatever she gets.
| A．costs | B．deserves |
| C．appoints | D．obtains |