________ to playing games recently，he is easy to feel sleepy in class.
| A．Addicted | B．Addicting | C．Having addicted | D．To addict |
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 |
There are many people standing in front of the government building, __________ some are peasants.
| A．of them |
| B．from which |
| C．who of |
| D．of whom |
Jia Sixie wrote down his advice in a book called Qi Min Yao Shu，__________ was considered an important summary of the knowledge of farming.
| A．which |
| B．who |
| C．that |
| D．what |
The factory is no longer __________ it was 5 years ago, __________ it was so poorly equipped.
| A．what； when |
| B．that； which |
| C．what； which |
| D．which； that |