Scientists across the world agree that this is an invention of _______ great significance, _______ invention that will greatly change human life.
| A．a; the | B．a; an | C．/ ; the | D．/ ; an |
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By the end of 2007, about half a million peo
ple had flooded into the city, ____ up around 10 percent of its total population.
| A．make | B．made | C．making | D．to be made |
We must avoid _____ a bad impression on others in public places .
| A．to leave | B．leaving | C．to have left | D．leave |
The ______ boy was last seen ____ near the East Lake.
| A．missing; playing | B．missing; play | C．missed; played | D．missed; to play |
– Have you heard that Tom, along with his parents, ______ to Japan?
-- Really? No wonder I haven’t seen him these days.
| A．has been | B．has gone | C．have been | D．have gone |
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