30. The No. 5 subway line, ______in October, 2007, has greatly improved the traffic conditions in Beijing.
With time _______ by, he began making films.
Their daughter ___ a key university this year, which made their parents very satisfied.
The lecture was so _____that we were all _____.
One day, news came ____ Britain’s old king had died without a son.
If you hurry up, I think it is quite ____ that you will catch the flight to Hong Kong . There are 40 minutes left.