It is __________ to spend money on preventing illnesses by promoting healthy living rather than spending on trying to make people ___________ after they are ill.
| A．good ; good | B．well; better | C．better; better | D．better ; good |
Experts think that _______ recently discovered painting may be _____Picasso.
| A．the;/ | B．a; the | C．a; / | D．the; a |
most parents care about is to provide the best education for their children.
| A．What | B．That | C．How | D．Whether |
--- May I smoke here?
--- If you , choose a seat in the smoking section.
| A．should | B．could | C．must | D．may |
The government has taken measures air quality.
| A．to improve | B．improved | C．being improved | D．to be improved |
a little money, Jane was able to buy her mother a lovely new watch.
| A．To save | B．Saving | C．Saved | D．Having saved |