A fantastic idea occurred to him he could use a plastic bottle, cut off, as a container

A fantastic idea occurred to him he could use a plastic bottle, cut off, as a container to grow young plants in.
A. which; whose top
B. that; the top of which
C. that; with its top
D. whether; whose top

A. which; whose topB. that; the top of whichC. that; with its topD. whether; whose top解析：考查同位语从句和独立主格结构，第一空是that连接的同位语从句，that起到连接的作用，不做成分，解释idea的内容，第二空是with复合结构，with+宾语（its top）+宾语补足语（cut），这不是定语从句，如果此题考查的是定语从句，则cut off 前要加was。该题考查的是with 的复合结构，所以C项正确。

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