Mary is being punished（惩罚） by the headmaster. That was______ she broke the school rules.
| A．why | B．because of | C．the reason why | D．because |
The weather turned out to be very good，________ was more than we could expect.
| A．what | B．which | C．that | D．it |
Is this the factory ________ he worked ten years ago?
| A．that | B．where | C．which | D．the one |
Alice received an invitation from her boss，________ came as a surprise.
| A．it | B．that | C．which | D．he |
I have bought two ballpens，________ writes well.
| A．none of them | B．neither of them |
| C．neither of which | D．none of which |
Is ________ some German friends visited last week?
| A．this school | B．this the school |
| C．this school one | D．this school where |