By the middle of the 21st century, the vast majority of the world’s population _____ in cities rather than in the country.
| A．are living | B．will be living | C．have lived | D．will have lived |
-–Mary knows the city quite well.
--She______ well have been there before.
| A．need | B．could | C．should | D．may |
The past two years ______a sharp rise in oil price, which adds to the burden of auto transportation industry.
| A．has witnessed | B．witnessed | C．is witnessing | D．witnesses |
-- How could you be so rude as to walk in here in the middle of my class?
--- _________.
| A．Nothing much | B．Nothing serious |
| C．Never again | D．Never mind |
Not until the stadium of Bird’s nest was completed in the end _______ back to their normal position.
| A．did our hearts got | B．did our hearts get |
| C．our hearts got | D．our hearts did get |
_______ the necklace borrowed from her friends made her ______ completely.
| A．Losing; upset | B．To lose; to be upset |
| C．Losing; upsetting | D．Lost; upset |