请选择DCBA+m3{1I/d+YThere _____ four windows.4C5q:T1]:s9u,E9k6V)V/g:P0J1s2R*D,~*e
A. is4C5q:T1]:s9u,E9k6V)V/g:P0J1s2R*D,~*e
B. are4C5q:T1]:s9u,E9k6V)V/g:P0J1s2R*D,~*e
C. has4C5q:T1]:s9u,E9k6V)V/g:P0J1s2R*D,~*e
D. have4C5q:T1]:s9u,E9k6V)V/g:P0J1s2R*D,~*e