题目内容：

[-B17] 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
翻译并分析

优质解答

工厂的发展速度受到很多因素的影响,其中大部分因素是我们无法控制的.
which作关系代词引导的定语从句.what在定语从句中不可用作连接词.A和D不属定语从句,不过如果前加个and ,作为句子也是对的.