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5.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

 The growing speed of a plant is influenced by a number of factors, _____ are beyond our control.

1. 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.

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