The price of a watch is higher than_____of a pen.A.it B.price C.any D.that请加理由

The price of a watch is higher than_____of a pen.A.it B.price C.any D.that请加理由
The price of a watch is higher than_____of a pen.A.it B.price C.any D.that
请加理由

The price of a watch is higher than_____of a pen.A.it B.price C.any D.that请加理由
that
代词,代指价格（=the price）

that
考查that of 的用法，that在这里指代前面提到的the price ，that用来指代不可数名词和单数可数名词，如果是复数则用those