30. The No. 5 subway line, ______in October, 2007, has greatly improved the traffic conditions in Beijing.
| A．opened | B．was opened | C．being opened | D．to be opened |
----Is there any possibility of the film _____in Paris International Festival?
----Not in the least, because the audience generally think little of it.
| A．being tried out | B．tried out | C．trying out | D．to try out |
The driver was at____ loss when ____word came that he was forbidden to drive for speeding.
| A．a; the | B．a; / | C．the; the | D．/; / |
When _____ comes to codes of ethics, I think everyone should strictly obey them.
| A．that | B．this | C．it | D．one |
One of the collectors collected some seeds from a tree that had _____ him.
| A．interest in | B．appealed to | C．been attracted | D．drew attention of |
It was in the factory _________ his friend worked _______ he picked up a lot of experience.
| A．where, where | B．that, where | C．that, that | D．where, that |