No matter how exciting space exploration sounds, there’s an important point that needs to be considered: food supplies. Right now, astronauts typically       1     (依赖) dry food in airtight bags and cans, since there are strict weight limits on items taken into space. Foods that we     2     (认为是理所当然的), such as fresh fruit and vegetables, are out of the question for space explorers.

For those who     3     (有强烈的愿望) to grow food during space flights, they’ve faced many difficulties, including the absence of gravity, and a lack of soil, air and humidity (湿度). However, growing food to add and minimize the food that must be carried to space will be increasingly important on long-duration flights into space. Recently, a leading team has worked out how plants can absorb nutrients from human urine (尿). Human urine is 95 percent water, with the other 5 percent    4     (构成；组成) nutrients which are harmful to the human body but not to plants, and it could supply three to four out of the six nutrients that plants need. By recycling liquid waste and producing food, an efficient cycle will be created.

And most importantly, the duration of space flights will be greatly extended to “20 years of flight”, meaning we may be soon sending astronauts on flights to Mars, or even beyond.

Our comfort foods are highly     1    . They vary from person to person, depending on our own unique experiences that have     2     our lives. If we grow up eating certain foods in our family, then those foods tend to be linked with positive     3    . For example, we often connect chicken soup with a happy childhood and its     4     becomes tied up with the feeling of being taken care of. When we eat it again, we     5     memories of a time when we were loved and looked after, and this cheers us up.

The c    1     of spicy, salty, sweet and sour flavors makes Gong Bao Chicken hard to     2     (抗拒). What’s more, it’s easy to make and can be     3     (适应) to individual tastes. So, don’t forget to pick up some chicken on your way home and try this     4    (菜谱) out.

I’m here in Sydney! Since I arrived, my friend has brought me to… different but yummy meals with me, so my first     1     of Australia have been all about food! … everywhere provide some of the     2     food experiences in the world. The influence of Asian cultures, … the introduction of bean curd and Asian herbs, along with Australian     3     of foods like the Chinese-inspired dim sum.

The stores in the Chinatown offer     1     souvenirs, goods, and clothing. All kinds of     2     can be found, too, and there are Chinese tea stores, where visitors can taste and buy     3     Chinese tea.

But perhaps what many tourists and San Franciscans     4     about Chinatown is its food. There is Chinese food to     5     with traditional dishes from all over China.

The feeling of happiness and sense of     1     can become particularly important for people     2     move away from their home country.    3     to some experts, there are some     4     of culture that people will lose right away, but with food, there are more opportunities to     5     to memory, family and place.

Food serves social needs as well as physical and     1     ones. People often combine eating with the     2     of friends and family because both experiences are pleasurable. In some families, mealtime is the only time of day that the whole family can be together. Food also plays a     3     role in     4     social traditions. Many social occasions are associated     5     specific food --- birthday cakes, Thanksgiving turkeys or fourth of July cookouts.

Whenever 1 feel lonely, I have a secret recipe that never fails: rice, milk and sugar, cooked low and slow. No matter how bad my mood is, that perfect combination is always enough to lift my spirits. Sometimes the smell alone can do the trick, not to mentionthe lovely     1     flavor, which works like a time machine immediately    2     me back to my sunny childhood. With pleasure, I remember the lazy Sunday afternoons I used to spend in the warmth of my grandma's flat, listening to her wonderfu tories and     3     eating bowl after bowl of her delicious rice pudding.I take my time over every     4     gently rolling the silky dessert around my mouth and enjoying the perfect     5     of rice and milk. Before I know it, I'm happy again.