One more month，________these baby birds will fly out of their nest.
| A．or | B．and | C．but | D．otherwise |
"Why did you go to the wrong class, Mr. Wang "
"Well, I forget _______ I was supposed to go to."
| A．which the room | B．which room |
| C．what was the room | D．what room was it |
I don't doubt ________ he'll come.
| A．that | B．if | C．what | D．whether |
Why the explosion occurred was ____the laboratory attendant had been careless.
| A．for | B．because | C．since | D．that |
They came to the conclusion ________ by a computer.
| A．that not all things can be done | B．because of not all things be done |
| C．being not all things can be done | D．because not all things can be done |
________ is no reason for dismissing her.
| A．Because she was a few minutes late | B．Owing to a few minutes late |
| C．The fact that she was a few minutes late | D．Being a few minutes late |