The father as well as his three children____ skating on the frozen river every Sunday afternoon in winter
| A．go | B．is going |
| C．are going | D．goes |
The thief fell to the ground, his left foot _____ and blood _____ down from his mouth.
| A．breaking; running | B．broken; running |
| C．breaking; run | D．broken; run |
Xiamen—Shenzhen High Speed Railway opened to traffic on Dec.28 last year, _______ the two of China’s economic zones.
| A．to link | B．linking |
| C．linked | D．having linked |
________ with the courage and determination of the young cancer patient, many people left messages in his microblog, encouraging him to fight with the disease.
| A．To impress | B．Impressing |
| C．Having impressed | D．Impressed |
Having taken our seats, _______.
| A．the professor began the lecture |
| B．the lecture began in no time |
| C．we were attracted by the lecture immediately |
| D．the bell announced the beginning of the lecture |
The students listened carefully to the teacher with their eyes _____ on the blackboard.
| A．focused | B．to focus |
| C．focusing | D．being focused |