阅读下面短文，并用英语回答问题(请注意每小题的词数要求)。
A lot of families in Britain grow vegetables. A few people grow unusual or strange vegetables. But a great many people like to grow tomatoes. My neighbour grows the biggest and sweetest tomatoes in the world. “How do you do it?” I ask. “Why can’t I grow tomatoes like yours?”
“I talk to them,” my neighbour says. “I’ve been talking to my tomatoes for years. ” Up to now, I have always laughed at this.
This summer, some scientists carried out an interesting experiment(实验), and I have just read their report.
They grew three sets of tomato plants. Nobody talked to the first set, but every day for a month, they played a recording of a man’s voice to the second set, and a recording of a woman’s voice to the third set. At the end of the month, the second set of plants grew 4 cm taller than the first, and the third set of plants grew 5 cm taller than the second. The plants liked the woman’s voice best.
“We can’t explain(解释)it,” a scientist said, “But sound waves(声波)surely help the tomatoes to grow. Plant growers have always paid attention to light and water. Now, we advise you to think of sound waves in the same way. ”
1. Why does the writer’s neighbour grow better tomatoes?(不超过5个词)

2. What did the scientists play to the second set of tomatoes?(不超过10个词)

3. Which set of tomatoes grew best in the experiment?(不超过5个词)

1.Because he talks to them.
2.A recording of a man’s voice.
3.The third set.