题目内容：

阅读短文，并按照题目要求用英语回答问题。

“Tennis – I’m saying goodbye.” With these words, Russian tennis superstar Maria Sharapova, 32, has announced her retirement.

“How do you leave behind the only life you’ve ever known?” she asked herself. Several reasons played a role in Sharapova leaving the tennis court for good.

Over the last couple of years, she’s dealt with an injury in her right shoulder and inflammation (炎症) in her forearms that may have prevented her from returning to top form. In more recent news, the death of her longtime friend, US basketball legend Kobe Bryant, also played a factor in her decision to retire.

“As I think you’ve seen throughout my career, my perseverance ( 毅 力 ) has been my greatest tool, my greatest strength,” Sharapova said in an interview. “But I’ve started feeling like it was becoming a weakness, because the stubbornness (执着) that was keeping me going was keeping me going for wrong reasons.”

Sharapova rose to stardom (明星身份) at age 17 when she won Wimbledon in 2004. She won a total of four Grand Slam singles titles: the 2006 US Open, the 2008 Australian Open, and the 2012 and 2014 French Open. She also earned the Fed Cup title in Russia in 2008 and an Olympic silver medal in singles in 2012, among many other accomplishments.

For 16 straight years from 2004, Sharapova was the world’s highest-earning female athlete, according to Forbes. Off the court, she made millions of dollars from companies such as Evian and Nike, as well as starting her own candy company.

“Tennis showed me the world --- and it showed me what I was made of,” Sharapova wrote on Facebook on Feb 26, alongside a photo of herself as a young girl with a tennis racquet (球拍). “It’s how I tested myself and how I measured my growth. And so in whatever I might choose for my next chapter, my next mountain, I’ll still be pushing, I’ll still be climbing，I’ll still be growing.”

1.What made Maria Sharapova decide to retire at the age of 32? (no more than 10 words)

2.What does Para. 5 mainly talk about? (no more than 10 words)

3.How did Maria Sharapova become the world’s highest-earning female athlete? (no more than 20 words)

4.What does the underlined sentence mean in the last paragraph? (no more than 10 words)

5.Do you think perseverance (毅力) is always our greatest tool? Give your reason. (no more than 20 words)