Перевести и подчеркнуть глагол, выражающий возможность действия
The proposed structures may not have been established with complete certainty
ЗАДАНИЕ 5
В каждом предложении подчеркните глагол, выражающий долженствование.
At first man had no carriages and when he needed to carry things from place to place, he had to use his own muscles.
A travel to the Moon needs a great deal of planning. For a beginning we must decide what flight route we may follow.
There is a project of round-the-year sea and river navigation in which Russia, the USA and Canada should be jointly interested.
The problem now is to create new materials not existing in nature and having required properties.
ЗАДАНИЕ 6
В каждом предложении подчеркните глагол, выражающий возможность совершения действия.
Rontgen knew that the cathode rays could make screen glow.
An important factor of melting ice in the Arctic might be the possibility of round-the-year sea and river navigation.
Flying from one part of the world to another satellites will be able to investigate the balance of sunlight energy absorbed and dissipated in the earth's atmosphere.