It was some time _______ we realized the truth.
| A．when | B．until |
| C．since | D．before |
8. We missed our train, and ___ the next train was delayed, ____ we had to wait for two hours.
| A．on top of that; in that case | B．as a result; so that |
| C．because; therefore | D．what was worse; in which case |
7. Not only ______ interested in football but ______ beginning to care about it.
| A．the father is; his family are | B．the father is; is his family |
| C．is the father; his family are | D．is the father; his family is |
6. Measures have been taken to prevent accidents, but much ______ for more improvement.
| A．remains to be done | B．is remained to do |
| C．remains to do | D．is remained to be done |
5. From this story, you can have some idea ______ can be used in reality.
| A．that you have learned | B．how what you have learned |
| C．how that you have learned | D．how you have learned |
4. We believe ______ you have been devoted to ______ naturally of great necessity.
| A．that; being | B．all that; be | C．what; is | D．that all; are |