Question

【题目】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

Answer 1

【答案】B

【解析】考查对句子结构及定语从句的理解和应用。根据句子结构——逗号前面为一个完整的句子，后面句子与前面没有连词连接，故只能是从属成分，从而排除选项A；逗号后面为非限制性定语从句，关系代词不能用what或that，因此答案选B。若横线前有and则选A。