1. Time is often spent together by my relatives.
2. Mathematics is usually taught in school.
3. A museum was visited last Sunday.
4. Friend will be met near the university tomorrow.
5. My new friends will be introduced to my parents tomorrow.
6. A custom-house for the examination of foreign goods was set up in 1749.
7. The custom-house was replaced by the fortress in 1761.
8. The Don river is usually nicknamed as "Father Don" by the inhabitants.
9. Rostov-on-Don is always called the gateway to Caucasus.
10. That church will be restored next year.