1) Do you have any idea why the police are here? Has anything happened?
In English, "police" is considered a plural noun, so the correct verb form is "are."
2) I tried not to think about what had been done the day before.
Here, the past perfect tense "had been done" is used to indicate an action that was completed before another action in the past.
3) Please don’t turn the television down: it’s my favourite piece of music.
To "turn down" the television means to reduce the volume, which makes sense in this context because the speaker wants to listen to their favorite piece of music.
4) She was busy at that moment and did not hear what was being discussed in the talk show.
The past continuous passive "was being discussed" indicates an action that was ongoing at a specific moment in the past.
5) Don’t be afraid to keep your money in this bank. It will be safe here.
"It" refers to the bank as a singular entity, making it the correct pronoun to use here.
6) They are showing a new series of programmes about the animal world.
In British English, "series" refers to a set of television or radio programmes with the same title, often related in content. "Serial" is used for a story divided into parts, typically broadcast over a period.
7) Nobody knows what the film is like, it has not been shot yet.
"Has not been" is the correct tense because it indicates that the film shooting has not occurred up to now.
8) Mass media are very important in the life of every social community.
"Mass media" is treated as a plural noun, so the verb form should be "are."
9) In my view it is impossible to spend all your free time in front of the TV or the computer.
"Impossible" is the correct word here because it means something that cannot be done.
10) I felt I was being spied on and I became frightened.
The phrase "being spied on" correctly uses the preposition "on" to indicate that someone was secretly watching or observing the speaker.
