题目内容
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 |
B
考查非限制性定语从句的“代词＋which”的用法，原句可还原成…Most of the growing speed of a plant are beyond our control.
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