1 . When Mrs Smith arrived at her company, she saw her office ________ dark blue by some workers.

A．to paint

B．painting

C．being painted

D．to be painted

2 . ________ 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

3 . ________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

4 . ______ many difficulties in the US, Qian eventually returned to China in 1955.

A．To overcome

B．Having overcome

C．Overcoming

D．Overcome

5 . There is no guarantee that all the vaccines ____ now will succeed. But the failures shouldn’t erode the public trust in the _____ ones.

A．developing…approved	B．being developed…approved
C．developing …be approved	D．developed…being approved

6 . _________ 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

7 . _____ a national competition in 1986 with her Spirit of the Peacock dance, she has been known as the“Peacock Princess“.

A．winning

B．won

C．To win

D．Having won

8 . ________ such a challenge, once Cindy realized the importance of the project, she immediately ________ gathering all the necessary resources, hoping to make it a success.

A．Never having tackled; set about	B．Having never tackled; set about
C．Having never settled; set out	D．Never having settled; set out

9 . Many Chinese people were moved to tears each time the TV showed our national flag___________ in an Olympic stadium.

A．to rise

B．to be rising

C．raised

D．being raised

10 . _______ 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