Open the brackets using the correct form of the Gerund 1) He liked to do things without (to disturb) anyone or (to disturb).
2) I was angry at (to interrupt) every other moment.
3) He was surprised at (ask) about it.
4) The water requires (to filter).
5) Thank you for (to come).
6) On (to heat) to a sufficient temperature any body becomes a source of light.
7) After (to look) through all the magazines he came across a very interesting article about optics.
8) Our success depends on (supply) with the necessary equipment.
9) He admitted (do) wrong.
10) A quantum chemist is interested in (construct) adequate mathematical models of atomic and molecular structures.
11) He denied (see) this man before.
12) You never mentioned (speak) to them on the subject.

1) He liked to do things without disturbing anyone or being disturbed.
- "Without disturbing anyone" means that he does not want to bother or interrupt anyone while doing things. "Or being disturbed" means that he also does not want to be bothered or interrupted by anyone.

2) I was angry at being interrupted every other moment.
- "Being interrupted" means that someone is constantly stopping or disturbing you while you are doing something. "Every other moment" means that it happens frequently.

3) He was surprised at being asked about it.
- "Being asked" means that someone is questioning or inquiring about something. "About it" refers to the subject that is being asked about.

4) The water requires filtering.
- "Requires" means that something needs or demands something else. "Filtering" means the process of removing impurities or unwanted substances from the water.

5) Thank you for coming.
- "Thank you for" is an expression of gratitude or appreciation for something. "Coming" refers to the act of arriving or being present.

6) On heating to a sufficient temperature, any body becomes a source of light.
- "On heating to a sufficient temperature" means that when something is heated up to a specific degree. "Any body" refers to any object or material. "Becomes a source of light" means that it starts emitting or producing light.

7) After looking through all the magazines, he came across a very interesting article about optics.
- "After looking through all the magazines" means that he searched or examined all the magazines. "Came across" means that he unexpectedly found or encountered something. "A very interesting article about optics" refers to the specific content of the article that he found.

8) Our success depends on being supplied with the necessary equipment.
- "Our success depends on" means that the achievement or positive outcome of something is influenced by another factor. "Being supplied" means that we receive or are provided with something. "The necessary equipment" refers to the specific tools or resources that are required.

9) He admitted doing wrong.
- "Admitted" means that he acknowledged or confessed to something. "Doing wrong" means that he recognized or accepted that his actions or behavior were incorrect or not morally right.

10) A quantum chemist is interested in constructing adequate mathematical models of atomic and molecular structures.
- "A quantum chemist" refers to a scientist who specialized in the field of quantum chemistry. "Is interested in" means that they have a curiosity or desire for something. "Constructing adequate mathematical models" means that they aim to create precise and suitable mathematical representations. "Atomic and molecular structures" refers to the arrangement and composition of atoms and molecules.

11) He denied seeing this man before.
- "Denied" means that he refused or contradicted something. "Seeing this man before" means that he claims to have never met or encountered this person previously.

12) You never mentioned speaking to them on the subject.
- "You never mentioned" means that you did not bring up, discuss, or talk about something. "Speaking to them on the subject" means that you did not have a conversation or communication with them about the specific topic.