key

US /ki/

UK /ki:/

A1TOEIC
n.NounAnswers to exercises, as at the back of a book
Check your answers against the answer key after you finish doing the practice test
n.NounSomething you use to open a lock or start a car
I think I left my key at the office
adj.AdjectiveImportant; necessary to make an action successful
The key element in this mixture is the vinegar
n.NounButton on a computer keyboard used for typing
The Home key is used to go to the top of the webpage or the start of a line
n.NounList that explains symbols or abbreviations
Here's the key so you can figure out what the diagram means
v.t.Transitive VerbTo enter information or data into a computer
All you have to do is key in the four-digit PIN to access your hotel room
n.NounA set of notes based on a particular note and making up a scale.
The song is written in the key of C major.

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