شرکت در آزمون آنلاین زبان انگلیسی 1 - زبان انگلیسی 1 | آزمون شماره 13555

When the sun shines, a leaf becomes a food factory. Sunlight comes into a leaf through the leaf’s skin, which is clear like glass. Beneath the skin are millions of tiny ‘bags’ called cells. Inside the cells are small packages filled with a green stuff called chlorophyll. The chlorophyll catches sunlight.

Air comes into the leaf through many tiny openings. Water and minerals, moving up from the roots far below; flow through the leaf. The air and water mix together and flow into the cells.

Green chlorophyll, using sunlight for energy, changes water and a gas from the air (called carbon dioxide) into sugar. Some of this sugar is used by the plant as food. Some is mixed with minerals from the ground and changed into other kinds of food.

The passage says that leaves have a skin that … .

During the time of the Shang, there were some interesting inventions. The Chinese …(A)… how to make bronze for the first time, by mixing other metals together. Bronze is an important metal because it is strong and lasts for a very long time. The Chinese made all kinds of things from bronze such as pots for cooking, cups for drinking, jewelry, and weapons.

  However, perhaps …(B)… development during the time of the Shang was writing. Once a civilization (well-organized and developed society) can write, people can pass on …(C)… about themselves, their lives, and what they believe. Although the Chinese started writing at this time, they did not have …(D)… yet, so people wrote on animal bones, on stone, on bamboo, and even on turtle shells!

Therefore, life for people in ancient China was quite different from our lives today.

A-

Michael started to run when the first … of rain began to fall