He tried to keep a straight face although he thought what she had done was very silly and stupid.
"They will try to make you mad, but keep your shirt on while I make the deal." "The waitress told the impatient customer to keep his shirt on, and that he would be served when it was his turn."
This is not an idiom - it means exactly what it says. You should stay fit and healthy.
That's not an idiom. Keeping a matter secret means not letting anyone know about it.
It is just an idiom and has no history.
Stay calm
keep your chin up!
The idiom "keep an eye out for" refers to watching for something or someone. An example of a sentence using the idiom would be: Jeff should be arriving soon, so keep an eye out for him.
it means that
"They will try to make you mad, but keep your shirt on while I make the deal." "The waitress told the impatient customer to keep his shirt on, and that he would be served when it was his turn."
Keep watch on.
You have to be agile to keep up with sentence requests on the Internet.
Interia is the tendency of a moving object to keep a moving in a straight line
The wind was too strong, so I had to wind up my kite to keep it from blowing away.
This is not an idiom - it means exactly what it says. You should stay fit and healthy.
a sentence is.... I am just so absentminded, but I don't understand why i keep forgetting my things. thats a sentence using absentminded!
It is just an idiom and has no history.
That's not an idiom. Keeping a matter secret means not letting anyone know about it.