China is a big family with 56 ethnic groups. Among them, the Han Chinese is the     1    (large) group. The other 55 groups are the minority ethnic groups,     2    mainly live in the mountainous areas of southwest and northwest of China.

Being too far away     3     big cities, the minority ethnic groups are poor in economy and there people are not well-educated. They have very few     4    (understand) of science and technology.

So they must develop their economy.     5    (help) the people of the minority ethnic groups live better, the government should take some     6    (effect) measures. For one thing,     7    (encourage) more knowledgeable undergraduates to those poor areas is a good way to help the people there to get rid of poverty. For     8    , the advanced science and technology must be introduced into the minority ethnic groups to improve their living conditions. More importantly, people of the minority ethnic groups should     9    (give) equal opportunities to study and work. Only in these ways     10     China be more prosperous in the future.

In our daily life, we often meet with difficulties. Some people do nothing     1     wait, while others try hard to conquer(战胜)    2    . Personally, we should face with difficulties positively.

My memory drew me back to five years ago when I was    3    middle school student. At that time, I had great trouble studying English. First of all, I felt it hard to memorize English     4    (word). Besides I didn’t dare to say anything in class when I    5    (ask) questions. What annoyed me most was that I failed exams    6     (constant). I was about to give up    7     my English teacher found my problems. He encouraged me and gave me some good advice. So     8    (inspire) by him, I decided to settle my problems. Following his advice, I made progress gradually. I owe my achievement    9    the teacher whose encouragement was of great     10     (important).

3 . World Sleep Day falls on March 21. This year’s theme concerns sleep and women.

More women suffer from insomnia (失眠)than men, but only 4 percent of them go to a doctor to get help. Beijing’s The First newspaper     1    (report) recently. A study by     2     international organization in the paper said that women     3    (age) 30 to 60 sleep six hours and 41 minutes a day     4     average.

Young people have also been shown to suffer from a lack of sleep. Statistics from a Chinese medical research centre show that in     5    (city) like Beijing and Shanghai, 40 percent of young people suffer from insomnia, and 80 percent suffer from great tiredness due to poor quality sleep.

Experts blame heavy     6    (press) and competition at work for poor     7    (sleep) habits. The long-term effects can be unhappiness, anxiety and depression,     8     can in turn lead to chronic illnesses (慢性病),     9    (especial) in women.

There are, however, a couple of tricks for getting a good sleep, such as maintaining an optimistic attitude, keeping a regular,     10    (day) routine, or finding time for sports. Also, you can develop healthy habits, such as keeping the bedroom clean and avoiding tea, coffee, or wine before meals.

4 . Crossword puzzles and exercise are just a few of the habits that improve memory best. But to     1     (true) give your brain a push, you might want to take a simple tip to heart-and it’s nothing you learned in school.

So far, researchers from Waterloo University in Canada     2     (discover) what may be the easiest way to improve your memory ever. Their research, recently     3     ( publish) in the journal Memory, suggests that reading out loud to yourself can increase your recall skills     4     up to 15%.

In the study, scientists asked 95 participants to test four     5     (method): reading, silently, hearing someone else read, reading aloud and listening to a recording of oneself reading. Their result? The people     6     read the information out loud showed the best retention(保持)rates—about 15%     7     (high) in learning speed, in fact. You may want to add these brain-boosting foods that can improve memory to your diet, too.

“Read     8     needs to be remember out loud, and you’ll remember it better. Yes, it’s shat simple!” psychologist and study co-author Colin Macleod said.

So next time when you ‘re preparing for a big exam, spend some time     9     (read) loud. Trust us. It might make you     10     genius.

If you feel stressed by responsibilities at work, you should take a step back and identify(识别) those of       1     (great) and less importance. Then, handle the most important tasks first so you'll feel a real sense of     2     (achieve). Leaving the less important things until tomorrow     3     (be) often acceptable.

Most of us are more focused    4     our tasks in the morning than we are later in the day. So, get an early start and try to be as productive     5     possible before lunch. This will give you the confidence you need to get you through the afternoon and go home feeling accomplished.

Recent     6     (study) show that we are far more productive at work if we take short breaks     7     (regular). Give your body and brain a rest by stepping outside for     8     while, exercising, or doing something you enjoy.

If you find something you love doing outside of the office, you'll be less likely     9     (bring) your work home. It could be anything—gardening, cooking, music, sports—but whatever it is,     10     (make) sure it's a relief from daily stress rather than another thing to worry about.