7. найдите в предложениях инфинитив. 1. it has been decided to build a road around the village. 2. they want the new device to be produced by february. 3. the purpose of this book is to describe certain properties of metals. 4. to work in building construction was the dream of his life. 5. the experiment to be carried out is of great importance for our research. 6. to solve this problem we had to involve experts. 7. the engineer allowed the technology to be used. 8. he heard the engine start after a loud click. 9. concrete is strong in its resistance to loads trying to crush it. 10. they made construction workers wear the personal protective equipment.

To solve
 to build
to be produced
to describe
To work
to be carried и т. д.
Думаю, принцип понятен

1 to build 
2 to be
3 to describe
4 To work
5  to be
6 To solve 
7 to be
8 start
9 to crush
10 wear

My favorite time of year!
More than other seasons I like spring. This is not surprising, because in spring nature begins to awaken from a long sleep. Begin to bloom flowers, budding leaves on the trees, the young green grass envelops the entire surface of the earth that surrounds us, the sun begins to warm us with its rays, the birds begin to delight us with their singing.
I love it because spring is born anew nature, everything becomes easy. Among the seasons spring plays a special role. Every year she begins a new Chapter in the life of nature. In contrast to winter, spring is rightly called in the morning.
A lot of poets devoted their works to the spring. For example, Pushkin, Yesenin, Tyutchev, Fet wrote a beautiful poem. Savrasov, Shishkin wrote a delightful spring landscape. Vivaldi, Tchaikovsky composed his fantastic masterpieces under the influence of spring mood. Is in spring something magical...
With the arrival of spring, the whole world is filled with music. It replaces the winter silence and the howling of the wind. The ringing of Cappel, the murmur of streams, the cheerful chirping of birds – everything speaks about the onset of heat and joyful change. Snow every day becoming less. It disappears in the warm sunlight. In the air there is the smell of spring. All the people rejoice the spring.
Im already tired of snow and cold, I want sun and warmth. You can now take off the heavy winter clothes, without fear of frost and blizzards. But especially the spring happy children. How fun they play in the sunshine, running through the puddles and let boats! Here and there sounds cheerful laughter of children. With the onset of spring, the whole world becomes bright and colorful. Over the white silence. Now in the world everything will become bright green, sky blue and shining. The first leaves on the trees, breaks the first grass, and the river reflected the blue sky. This is a real spring!

My favorite time of year!
More than other seasons I like spring. This is not surprising, because in spring nature begins to awaken from a long sleep. Begin to bloom flowers, budding leaves on the trees, the young green grass envelops the entire surface of the earth that surrounds us, the sun begins to warm us with its rays, the birds begin to delight us with their singing.
I love it because spring is born anew nature, everything becomes easy. Among the seasons spring plays a special role. Every year she begins a new Chapter in the life of nature. In contrast to winter, spring is rightly called in the morning.
A lot of poets devoted their works to the spring. For example, Pushkin, Yesenin, Tyutchev, Fet wrote a beautiful poem. Savrasov, Shishkin wrote a delightful spring landscape. Vivaldi, Tchaikovsky composed his fantastic masterpieces under the influence of spring mood. Is in spring something magical...
With the arrival of spring, the whole world is filled with music. It replaces the winter silence and the howling of the wind. The ringing of Cappel, the murmur of streams, the cheerful chirping of birds – everything speaks about the onset of heat and joyful change. Snow every day becoming less. It disappears in the warm sunlight. In the air there is the smell of spring. All the people rejoice the spring.
Im already tired of snow and cold, I want sun and warmth. You can now take off the heavy winter clothes, without fear of frost and blizzards. But especially the spring happy children. How fun they play in the sunshine, running through the puddles and let boats! Here and there sounds cheerful laughter of children. With the onset of spring, the whole world becomes bright and colorful. Over the white silence. Now in the world everything will become bright green, sky blue and shining. The first leaves on the trees, breaks the first grass, and the river reflected the blue sky. This is a real spring!