He was unhappy when he sold his violin．After all，he ____________ it for a very long time．
| A．has had | B．had had | C．has | D．had |
The engineers are so busy that they have zero time for outdoor sports activities,___they have the interest
| A．wherever |
| B．whenever |
| C．even if |
| D．as if |
___the city centre,we saw a stone statue of about 10 metres in height
| A．Approaching |
| B．Approached |
| C．To approach |
| D．To be approached |
___from the top of the tower,the south foot of the mountain is a sea of trees
| A．Seen |
| B．Seeing |
| C．Having seen |
| D．To see |
___at my classmates’ faces,I read the same excitement in their eyes
| A．Looking |
| B．Look |
| C．To look |
| D．Looked |
The retired man donated most of his saving to the school damaged by the earthquake in Yushu,___the students to return to their classroom
| A．enabling |
| B．having enabled |
| C．to enable |
| D．to have enabled |