54.( ) --- We don’t know _____ he is. --- He is a doctor. (2010江苏淮安)
A. what B. which C. who D. whom
51.( )--- _____schoolbag is this? ---I guess it’s Lily’s. (2010北京市)
A. What B. Who C. Whose D. Which
54.( ) --- We don’t know _____ he is. --- He is a doctor. (2010江苏淮安)
A. what B. which C. who D. whom
51.( )--- _____schoolbag is this? ---I guess it’s Lily’s. (2010北京市)
A. What B. Who C. Whose D. Which