when dolphins get too near to the boats loaded with tourists, they could get caught up in ropes and killed by propellers(螺旋桨)．

　　Here's a little secret. Dolphins look like smiling at you, but actually they're just opening their mouths.

　　Go to See the Mona Lisa?

　　There must be something about the mysterious(神秘的) smile. The 6 million people who visit the lady in the Louvre every year can't all be wrong, after all. But they can be quite annoying, standing in front of you; holding up their cameras to prevent you from seeing anything. In fact, it is hard for you to see the painting clearly because you have to stay away from it for security reasons. After queuing for hours, many tourists can remain in front of the painting only for 15 seconds at most.

　　If the mysterious lady in the picture knew her fate, she wouldn't just be smiling, she'd be laughing.

　　So, still long to see the Mona Lisa? If you want to find out more about the list, read 101 Things NOT to Do Before You Die. Visit www.not2dobeforeidie.co.uk and buy the book at a 20% discount.

　　1. According to the passage, swimming with dolphins ________.

　　A. is the world's most popular tourist activity

　　B. gives fun to both tourists and dolphins

　　C. will make tourists busy and tired

　　D. can cause danger to dolphins

　　2. What does the author think about going to see Mona Lisa?

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