— Do you know who teaches _____ Chinese?

—Yes, Mr Wang does. [ ]

A. she

B. his

C. hers

D. him

土的击实试验中，试筒加湿土质量3426.7g，试筒质量1214g，试筒容积997cm³，土样含水量16.7%，则土样干密度是（）。

A.1.9

B.1.89

C.2.02

D.2.01