It was not until 1920 ___ regular radio broadcasts began.
| A．when | B．which | C．that | D．since |
The open university was started in order to help those who ____ having a university education when they were young.
| A．stopped | B．wasted | C．missed | D．ceased |
. –Mike got “ C” in his history test.
--_____? He has been working so hard at it .
| A．So that | B．How come | C．What for | D．Why not |
They will fly to Shanghai to visit the EXPO in 2010 ,____they plan to stay for two or three days.
| A．where | B．there | C．which | D．when |
Since the matter was extremely ______, we deal with it immediately.
| A．tough | B．tense | C．urgent | D．accurate |
You are saying that everyone should be equal, and this is ____I disagree.
| A．why | B．where | C．what | D．how |