—When did he leave the classroom?
—He left _____you turned back to write on the blackboard.
| A．the minute | B．the time | C．until | D．before |
Tom is good a studenthe is often praised by the teacher.
| A．such; as | B．so; as | C．such; that | D．so; that |
The girlis singing an English song in the next room is Tom’s sister.
| A．whom | B．which | C．whose | D．who |
is known to us all, he is an excellent student in our class.
| A．Who | B．That | C．Which | D．As |
This is the reason he was late for class today.
| A．why | B．for that | C．which | D．that |
his being late again, he lost his job and had to stay at home.
| A．Because | B．As result of | C．In case that | D．Because of |