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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.

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