I____ my homework at nine o'clock last Sunday morning.
| A．am doing | B．was doing |
| C．do | D．did |
Anxiously, she took the dress out of the package and tried it on, only ________ it didn’t fit.
| A．finding | B．found |
| C．to find | D．having found |
（）Anxiously, she took the dress out of the package and tried it on, only _________ id didn’t fit.
| A．to find | B．found |
| C．finding | D．having found |
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 |