修枝
参考答案：
据树木枝条生长的自然规律，人为修除树木枯枝或活枝，以培养优良树形、增强树势、促进主干或侧枝生长发育的措施。
we _____ the cost of the holiday and think that we could offord it.
A．draw out
B．look out
C．carry out
D．work out
中古平声按照什么条件分化为现代普通话的阴平、阳平？
