请选择CBA'~-W)W*{6X The birds sing ________ .(Z+c5Z8q2H4v-i5X
A．beautifully(Z+c5Z8q2H4v-i5X
B．beautiful(Z+c5Z8q2H4v-i5X
C．beauty(Z+c5Z8q2H4v-i5X