keep on one's toes
быть бдительным, внимательным
Mark tried to keep on his toes during a grammar test.
Другие идиомы:
- keep good time
- keep tabs on (someone or something)
- keep one's opinions to oneself
- keep one's place
- keep up appearances
- keep a stiff upper lip
- keep the home fires burning
- keep one's nose clean
- keep one's chin up
- keep at (something)
- keep up with (someone or something)
- keep one's word
- keep one's feet on the ground
- keep one's eye on the ball
- keep a close watch on (someone or something)