请选择ABCD9?+@-vThe conference __________ a full week by the time it ends.0l(E4}1X8f(o1Z
A. must have lasted0l(E4}1X8f(o1Z
B. will have lasted0l(E4}1X8f(o1Z
C. would last0l(E4}1X8f(o1Z
D. has lasted0l(E4}1X8f(o1Z