阅读理解。 Bad days happen to us all. Often a day that starts out bad just continues to get worse. But why? Sometimes there's a ' domino effect (多米诺骨牌效应)' with bad events. For example, you sleep through the alarm, so you're stressed. And you will sit in the bad traffic, which will also make you late to work, etc. How can we turn a bad day to a good day? Here are some ideas that have worked for me: Smile (微笑) a lot Smiling a lot will help you feel relaxed. Research has shown that smiling produces three useful chemicals (化学物质) which make us feel good. Talk to a good friend Talk to someone who cares and listens really does help us feel better, too. Concentrate on your good things It's hard to concentrate on how bad things are when you're concentrating on how good things are! Think of 10 or more things you're thankful for, and you'll achieve a whole new outlook (人生观) on your day. Get some exercise If you can, go for a walk. Exercising will help you feel better. Exercising can get your day back to be normal again. Make the day a challenge If you make yourself think of the day as a challenge, you'll start to do all the things you can to make your day better. 1. According to the passage, the 'domino effect' is an effect that . A. turns a good day to a bad day B. makes one person affect another C. turns bad things into good things D. gets one event to cause other similar events to happen 2. Study shows that smiling produces three useful chemicals which make us feel . A. terrible B. relaxed C. stressed D. worried 3. According to the writer, if we consider a bad day as a challenge, we'll . A. try our best to do things B. give up doing things C. lose all our confidence D. have a terrible day 4. How many ways does the writer give us to help us not to make a bad day stay bad? A. 3. B. 4. C. 5. D. 6. 5. Which of the following can be the BEST title for the passage? A. When we should smile a lot B. How to deal with problems C. How to turn a bad day around D. What things we should concentrate on