题目内容：

阅读下面短文并回答问题, 然后将答案写到题后相应的位置上（请注意问题后的词数要求）。

When my father was celebrating a milestone (里程碑) birthday, I pulled together a surprised gift that he would never forget.

On his 60th birthday ,I had a fun idea: What if I could get the memories people had of him, put each one into an envelope (信封) - 60 in total - and have him open them, one by one, on his birthday? So I wrote an e-mail to family and friends, explaining my idea.

I sent the e-mail and waited. And then the replies started coming in and I was very, very astonished. There were so many memories, and they were all so lovely. They came from the 50s, 60s, 70s, from every decade(十年)between now and the day my dad was born. They came from my mother, my siblings, my grandma, my dad's friends from high school, his sister, my dad's first boss, a colleague at his first job, from people who hadn't seen my dad in 40 years, from people I myself hadn't even informed. They typed them and handwrote them. They mailed them and e-mailed them.

The night before Dad's birthday, my sister and I stayed up late, putting the mails into envelopes.

The next morning, after breakfast and presents and cake, we gave the pile of envelopes to him. "Just one more thing for you," we said.

It took him a long time to open them and read. Each one was a brief ticket to another time, a leap (跳跃) backward over years and decades. There was a lot of laughter and a few tears in his face .

I was kind of sad when the project of the memories about my father was over because it was great fun to collect these memories.

1.When did the author give her father a surprised gift? (no more than 5words)

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2.what does the underlined word "astonished" in paragraph 3 probably mean? ( no more than 1 words)

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3.Why did the author and her sister stay up late the night before their father's birthday? ( no more than 10 words)

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4.How did the author's father most probably feel when he read the mails? ( no more than 2 words)

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5.What was the surprised gift ? ( no more than 6 words)

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