Вопрос № 857091 - Английский язык

Употребите нужную видовременную форму глагола в косвенной речи.
I asked who they _______ about.

Употребите нужную видовременную форму глагола в косвенной речи.
He asked if it _______.

Употребите нужную видовременную форму глагола в косвенной речи.
He says that he _______ in Kiev two years ago.

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In a star there are two main forces: expansion and gravity. In a blue star, when the force of gravity is stronger than the force of expansion the star collapses at its centre. Then, the pull of gravity from the centre of the star is so strong that it even swallows the light! This makes the star invisible: a black hole. Around each black hole there is an area called event horizon which emits radiation. There is a black hole at the centre of our galaxy.

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Scientists have made the low power reactor to provide arctic stations with a source of light and heat. It is highly specialized reactor. Instead of producing heat that goes to a turbo generator, this reactor produces steam in its own core.
The low power reactor is made portable because it is intended for use at remote stations. Its components can easily be taken apart and reassembled.

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Insulating materials have very low conductivity. They offer extremely high resistance to the flow of current. Insulators are used in electric devices to isolate conductors. Thus they should have a high dielectric strength and a high resistivity. Their mechanical properties are also important for practical use.
Insulators are divided into gaseous, liquid, solid. They are also divided into groups according to their heat resistance.