Okay, let's complete the text with the appropriate words. Here's the completed text with explanations:
I was born and live in the city of Orenburg, the capital of the Orenburg Region, Russia. My native city is very old, it was **(16) founded** in 1743. It was started as a **(17) fortress**; it protected the territories near the Ural River. Today Orenburg is an important economic and cultural city that is **(18) known** in interesting sights. There are theatres, concert halls, museums, buildings of the 18th and 19th centuries and **(19) monuments** to historical events and people who contributed **(20) to** the development of the region. Orenburg is famous **(21) by** wonderful Christian churches and Muslim mosques. My city is beautiful, comfortable, and friendly, it **(22) deserves** our love and care.
Here's the reasoning behind each choice:
* **(16) founded:** Cities are often 'founded' meaning established or created. The context of the sentence refers to the city's establishment.
* **(17) fortress:** A fortress is a defensive structure. Protecting territories aligns with the function of a fortress.
* **(18) known:** The city is known *for* its interesting sights. 'Known' fits the context of being recognized for something.
* **(19) monuments:** Theatres, concert halls, museums, and monuments are all types of landmarks. Monuments is the best choice to fit alongside them.
* **(20) to:** The phrase "contributed to" means helped or added to.
* **(21) by:** The city is identified *by* having wonderful churches and mosques.
* **(22) deserves:** If a city is beautiful, comfortable, and friendly, it 'deserves' love and care.
**Therefore, the answers are:**
* 16 - 2) founded
* 17 - 1) fortress
* 18 - 3) known
* 19 - 3) monuments
* 20 - 1) to
* 21 - 3) by
* 22 - 3) deserves