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

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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

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 months (三个月以来)--------有这样的时间状语存在,你就必须使用现在完成时.
明白了吗? a good day to you .

一道语法题 in the first three months that giant pandas it?(discover) that the giant pandas are endangered. The number of giant pandas ------(increase) in the last few protect the giant pandas是什么意思 protect the giant pandas是什么 first three months fifty-five students were born in the first three months 翻译 Import of the first three months this years is The number of the giant pandas in China is getting _________ it is very difficult for giant pandas to survive in the wild There will be no giant pandas in the world .这里no后面怎么加名词复数英语翻译1.How many giant pandas were there in the U.S.zoos befor