单选题He makes about $1000&nbsp

问题补充：

单选题Hemakesabout$1000everyweek，much______isspentonbooks.A.of whichB.in thatC.among whichD.of it

答案：

A解析定语从句补充完整为：much of the money is spent on books，所以用of which来引导这个定语从句。