1 . ________, he felt regretful and wanted to resign in spite of all his effort.

A．Having not passed the test	B．Not passed the test
C．His pupils not having passed the test	D．Not his pupils passing the test

2 . ________doing the cleaning in the house, Mrs Brown sat down on the sofa to have a rest for a while.

A．Having finished	B．Finished
C．To be finished	D．To finish

3 . ________ his life to the realization of social equality, the former President Nelson Mandela set a good example for all of us.

A．Having devoted

B．Devoted

C．To be devoted

D．Being devoted

4 . _________ several adjustments to the design for two months, the engineer eventually succeeded in building a highly efficient system.

A．Trying	B．Tried
C．Having tried	D．Having been tried

5 . _______ in having trade talks with a foreign company, she has stayed up for several nights.

A．Occupied

B．Being occupied

C．Having occupied

D．To occupy

6 . _______ his method, Tom was sure that he would succeed in his experiment.

A．Being improved	B．Improved
C．To be improved	D．Having improved

7 . ________ his task, he went home and found his house ________, so he had to call the nearby police station immediately.

A．Having finished; broken down	B．Finishing; broken into
C．Having finished; broken into	D．Finished; breaking down

8 . ______ of what happened in advance, she stood in the meeting room, confused and awkward.

A．Not having been informed	B．Not being informed
C．Having not been informed	D．Have been not informed

9 . ________ as a problem then, drugs were produced and sold openly, available to almost everyone who could afford them.

A．Having not been recognized	B．Not having been recognized
C．Not having recognized	D．Having not recognized

10 . I found a woman lying on the ground, _____with pain, so I called an ambulance.

A．screaming	B．to scream
C．having screamed	D．screamed