10 правил для родителей с словами must , should

You must help me, you must wash the dishes, you must mop the floor

1. It's not always easy for the old and the young to find a common language.
2. Don't envy the rich: money doesn't always bring happiness.
3. Governments have to develop social programs to help poor people.
4. I quite like old houses: they have an atmosphere of their own.
5. You don't look beautiful today!
6. Looking after the sick is a real art.
7. The beautiful are often admired.
8. Deaf people often use their hands to communicate in sign language.
9. Some of her relatives were among the dead and injured.
10. Have you ever been unemployed?
11. All parents want to see their children among the happy.

Have been tested - Новые три вагона поезда-цистерны были испытаны в суровых зимних условия на ж/д в Аляске.
will have been completed - Строительство моста и дамбы будет закончено к началу сезона навигации.
are being constructed - В настоящее время в Европе и Азии строятся 2500 км скоростных линий.
maintains - система кондиционирования воздуха всегда поддерживает оптимальную температуру и влажность в вагоне.
is being built - В настоящее время новая высокоскоростная железнодорожная линия строится на севере России. 
has caused - Потоп значительно повредил железнодорожную ветку.