There is much debate as to     1     makes a healthy diet. For example, scientists     2     (insist) for years that a big enemy of health is fatty food. However, there is increasing e    3     (证据) that the real driver of poor health is not so much fatty food, as it is sugar. In America, people who receive 25% of their daily calories or more through sugar are twice as likely     4     (die) from heart disease than people who receive less than 10% a day.

Therefore, it is necessary     5     (cut) down the foods that contain high amount of sugar. The American Heart Association     6     (recommend) that we limit ourselves to less than 100-150 calories a day from sugar,     7     is less than what is usually contained in one can of sweet drink or in a single candy bar.

Finally, there is no t    8     (窍门) healthy eating. Rather, healthy eating starts with having a healthy a    9     (态度) towards food. If you are using food mostly for     10     (nutritious), then you are on the right track with your diet. However, if food has become the centre of your life, you might be on the road to bad health. It is up to you to decide.

Tibetan antelopes live on the plains of Tibet, Xinjiang and Qinghai. Watching them move slowly     1     the green grass, I’m     2    (strike) by their beauty and also reminded of the danger they were in. They were hunted     3    (legal) for their     4    (value) fur.

Economic development is necessary if we want to improve society. There comes     5     time when the old must give way     6     the new and it is not possible     7    (preserve) everything from our past as we move towards the future. Finding and     8    (keep) the right balance between progress and the protection of cultural sites can be a big challenge. Big challenges, however, can sometimes lead to great     9    (solve).

By     10     (share) so many digital photos over the Internet, the group hopes to promote even     11     (wide) interest around the world in China’s ancient history, culture and traditions. They also hope to     12    (far) educate people about the importance of safeguarding historic and cultural relics for future generations to understand and appreciate.     13     one researcher who is working on the project explains, “Appreciating one’s own cultural heritage is very important for understanding     14    (one). Appreciating the cultural heritage of other countries is very important for international     15    (communicate) and understanding.”

3 . 阅读下面材料，在空白处填入适当的内容（1个单词）或用括号内单词的正确形式（不超过3个单词）或根据首字母和中文提示填写单词的正确形式。

A smart home is one that     1     (integrate) computers into the structure of the building itself. In this way, many of the things that we now do ourselves will become     2     (自动的). For example, the smart home could control the air conditioning and lights so that you would no longer have to turn     3     (switch) on and off, making your home more energy-efficient. The smart home could also m    4     (监控) itself to make sure that everything is working     5     it should, and send you warnings     6     there is a problem. Such smart homes could even     7     (programm) to detect your health problems, and then give you relevant advice as to the food you should eat or if you should see a doctor. So, in a sense, smart homes will lead us to     8     (live) smarter lives.

This smart technology is not a fantasy. Many of these new     9     (innovate) are already available and being used in some homes. In this sense, the home of tomorrow is already the home of today. Nevertheless, it will take some years     10     most new homes begin to use this new technology.

A committee     1     to limit damage to the Egyptian buildings and prevent the loss of     2     relics. The group asked for     3     from different departments and raised funds     4     the international community. Experts     5     the issue, conducted several tests, and then made a     6     for how the buildings could be saved. Finally, a    7     was signed, and the work began in 1960.

The project     8     together governments and environmentalists from around     9     world. Temples and other cultural sites were taken     10     piece by piece,    11     then moved and put back together again in a place     12     they were safe from the water. In 1961, German engineers moved the     13     temple. Over the next 20 years, thousands of engineers and workers     14     22 temples and countless relics. Fifty countries donated nearly $80 million to the project. When the project ended in 1980, it was considered a great     15    .