Last year the number of death increased_______ 2% _________ 4% the year before.
| A．to, comparing to | B．by, comparing with |
| C．to, compared with | D．by, compared to |
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 |