The growing speed of a plant is influenced by a number of factors, _______ are beyond our control.
A.most of them
B.most of which
C.most of what
D.most of that
网友回答
B解析考查定语从句。先行词为a number of factors，他们当中的，应用 most of which 。句意为：植物的增长速度受许多因素的影响，大多数超过了我的控制范围。故选B。