9.When _______how a statue from distant Greece could have appeared in China,researchers explained that no doubt this was a result of Alexander the Great's influence.( )
A. | to be asked | B. | asking | C. | asked | D. | being asked |
7.The Chinese abacus(算盘),officially ______ as a cultural heritage at the 8th Annual UNESCO World Heritage Congress,is another symbol of Chinese wisdom.( )
A. | having listed | B. | listed | ||
C. | having been listed | D. | listing |
5.There was a _______ look on her face when she met with the _______ problem.( )
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A. | confusing; confusing | B. | confused; confused | ||
C. | confusing; confused | D. | confused; confusing |