The growing speed of a plant is influenc
题型：选择题
问题：
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
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