_______ I toured Zhangjiajie, I was deeply impressed with its beautiful scenery.
| A．For the first time |
| B．At first |
| C．It was the first time |
| D．The first time |
To ___ the puzzlement of the students, the teacher explained it once again to them.
| A．explain |
| B．instruct |
| C．clarify |
| D．classify |
___ the smell of the meat, the dog ran into the room very quickly.
| A．Attracting |
| B．Attracted by |
| C．Arrested by |
| D．Caught by |
___, Nathan gave back the enormous amount of money he found.
| A．To his credit |
| B．To his joy |
| C．To his surprise |
| D．To his sorrow |
The first aid work ___ three parts, of which saving the people’s lives is the most important one.
| A．makes up of |
| B．consists of |
| C．is separated from |
| D．divides into |
I’m calling to enquire about the position ___ in yesterday’s China Daily.
| A．advertised |
| B．to be advertised |
| C．advertising |
| D．having advertised |