Is _____ necessary to take off our shoes when we enter the computer lab?
| A．this | B．it | C．everyone | D．he |
Although he had only entered the contest for fun, _________ he won first prize.
| A．but | B．and | C．even | D．不 填 |
Just because they make more money than I do, _______ they seem to look down on me.
| A．so | B．and | C．but | D．不填 |
The point is not who said the words, _________ they are true or not.
| A．but whether | B．and whether | C．but how | D．and how |
I’m sorry, _________ I won’t be able to come tonight.
| A．for | B．and | C．but | D．then |
When the last prize had been awarded _________ everybody cleared off.
| A．and | B．so | C．or | D．不 填 |