Only when Lily walked into the office ______ that she had left the contract at home.
| A．she realized | B．has she realized |
| C．she has realized | D．did she realize |
The headmaster who had the grand ceremony waved to the crowds with a smile .
| A．included | B．joined | C．introduced | D．attended |
When the market economy is introduced, many factories will not .
| A．live | B．last | C．survive | D．keep |
This is an illness that can total blindness if it is left untreated.
| A．result from | B．lead in | C．result in | D．leave behind |
Our chemistry teacher a better way of working out the problem this morning.
| A．caught up with | B．came up with |
| C．put up with | D．got on with |
－What do you think of store shopping in the future?
－Personally, I think it will exist along with home shopping but ______.
| A．will never replace | B．would never replace |
| C．will never be replaced | D．would never be replaced |