It’s easy to make promises, but it’s hard work to keep them. Every year we promise to break bad habits and form good ones. But many of us ________ to follow through because it’s difficult to change.

There might be a way to ________ the problem, though. It’s called the 21/90 rule. To try it, choose a habit you would like to break, or ________ a good habit you would like to develop. Next, decide on a proper ________ to help you achieve your goal （目标）. For example, you might want to improve your English, your plan is to study English for 20 minutes a day.

This is where the 21/90 rule comes into play. For the next three ________ , spend 20 minutes in studying English every day. According to some research, you will have developed a new habit when the 21 days ________. After you follow your plan for 21 days, continue the ________ habit for another 90 days. At the end of that time period, you should no longer struggle（挣扎）to follow the new habit.

Of course, it’s not always ________ with the 21/90 rule. Researchers made an important Discovery. Some people require only 18 days, ________ others need up to 254 days. Many people believe it usually takes two months to make lasting changes in their lives.

There’s no time like the present to start making some changes in your life. With the ________ of the 21/90 rule, why not make changes now and have a new start?