46. _____ one of the most beautiful forms of performance art, ballet is a combination of dance and mime performed to music.
A. Being considered B. Considering C. Considered D. To consider
47. Having been served lunch, _____.
A. the problem was discussed by the members of the committee
B. the committee members discussed the problem
C. it was discussed by the committee members the problem
D. a discussion of the problem was made by the committee
48. Having traveled to different parts of our country, _____.
A. we have learned a lot about interesting lifestyles and customs
B. we are seeing a lot of interesting lifestyles and customs
C. many interesting lifestyles and customs have been learned by us
D. much has been learned about interesting lifestyles and customs