Question

There are many things 'I've had____I was a little child.A.for B.since C.when请说明原因

Answer 1

B. since
因为前面用的是are，不是were。证明我现在还拥有这些 many things。所以是since.
如果选for，是错误的语法。
如果选when，说明的是当我还是小孩的时候我拥有的事，前面应该用过去时were，而不是are。