________ in Tibet for ten years, he has been accustomed to the life and the climate there.
| A．He has worked | B．Having worked |
| C．He has been working | D．Working |
Between the two parts of the concert is an interval, __________ the audience can buy ice-cream.
| A．when |
| B．where |
| C．that |
| D．which |
Ted came for the weekend wearing only some shorts and a T-shirt, __________ is a stupid thing to do in such weather.
| A．this |
| B．that |
| C．what |
| D．which |
The film started to get boring, at __________ point I left the cinema accompanied by my twin sister.
| A．this |
| B．that |
| C．the |
| D．which |
There are 51 students in Class Three, __________ failed in the test.
| A．all of which |
| B．all of them |
| C．none of whom |
| D．none of them |
The Dragon Tower, from __________ top visitors can enjoy a good __________ of Harbin ,attracts hundreds of tourists every day.
| A．which； sight |
| B．whose ； view |
| C．its; view |
| D．where ； sight |