If the boy had _____ the dog alone it wouldn't have bitten him.
| A．set | B．left | C．had | D．put |
Alexander tried to get his work _______in the medical circles.
| A．torecognize | B．recognizing | C．recognize | D．recognized |
We were astonished _______ the temple still in its original condition.
| A．finding | B．to find | C．find | D．to be found |
Though_________to see us, the professor gave us a warm welcome.
A. surprising B. as surprised C. surprised D being surprised
19. His first book next month is based on a true story.
| A．published | B．to be published | C．to publish | D．being published |
_____ 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 |