Group activities will be organized after class _______ children develop team spirit.

A. helping              B. having helped

C. helped                 D. to help

The producer comes regularly to collect the cameras _______ to our shop for quality problems.

A. returning             B. returned

C. to return             D. to be returned

Today there are more airplanes________ more people than ever before in the skies.

A. carry               B. carrying

C. carried              D. to be carrying

______ the difference between the two research findings will be one of the worst mistakes you make.

A. Ignore             B. Ignoring

C. Ignored             D. Having ignored

Much time _____ sitting at a desk, office workers are generally troubled by health problems.

A. being spent            B. having spent

C. spent                  D. spending

_________ more about Chinese culture, Jack has decided to take Chinese folk music as an elective course.

A. Learn                B. Learned

C. To learn             D. To be learning

After receiving the Oscar for Best Supporting Actress, Anne Benedict went

on all the people who had helped in her career.

A. to thank                B. thanking

C. having thanked          D. to have thanked

______in painting, John didn’t notice evening approaching.

A. To absorb              B. To be absorbed

C. Absorbed               D. Absorbing

Listening to music at home is one thing, going to hear it  live is quite another.

A. perform                B. performing

C. to perform            D. being performed

____ in the poorest area of Glasgow, he had a long, hard road to becoming a football star.

A. Being raised           B. Raising

C. Raised                 D. To raise