He had a wonderful childhood, _____ with his mother to all corners of the world.
| A．travel | B．to travel | C．traveling | D．traveled |
【2015·安徽】______ 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 |
【2015·江苏】Much time _____ sitting at a desk, office workers are generally troubled by health problems.
| A．being spent | B．having spent |
| C．spent | D．spending |
【2015·福建】In recent years an English word "infosphere" has appeared, _______the sense of “information” and " atmosphere".
| A．combine | B．combined |
| C．combing | D．being combined |
【2015·福建】_________ 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 |
【2015·陕西】Back from his two-year medical service in Africa, Dr．Lee was very happy to see his mother______ good care of at home.
| A．taking | B．taken | C．take | D．be taken |