一道语法题 in the first three months that giant pandas

题目

一道语法题 in the first three months that giant pandas
一道语法题
in the first three months that giant pandas were on public display,visits to the zoo ( )by as much as 50 percent
为什么是 increased而不是have increased

答案

你好.很简单.1 in the first three months --------强调过去某一年的第一季度,当然用一般过去时.比如说：in the first three months of 2011,能不用一般过去时吗?必须是一般过去时.2 in the past / last three mont...