Question

【题目】Many visitors use knives to cut their names into the trees , _______ are hundreds of years old
A.some of them
B.some of which
C.which of them

Answer 1

【答案】B
【解析】句意：许多游客用刀把他们的名字刻到树上，其中一些树有几百岁了。这是一个定语从句，引导词用which，指代trees，some of构成整体与部分的关系，故选B。