请选择DCBA7z5_,i5\+{2A,a7t3P1r(o:L5^6[:] Several _________ new books were sold out last week。'N:C1e9x(b/?3].z:`
A.of thousand'N:C1e9x(b/?3].z:`
B.thousands'N:C1e9x(b/?3].z:`
C.thousand of'N:C1e9x(b/?3].z:`
D.thousand'N:C1e9x(b/?3].z:`