keep on one's toes
быть бдительным, внимательным
Mark tried to keep on his toes during a grammar test.
Другие идиомы:
- keep harping on (something)
- keep one's nose out of (something)
- keep (something) under one's hat
- keep a close watch on (someone or something)
- keep one's chin up
- keep track of (something)
- dip one's toe in the water
- keep to oneself
- keep (someone) on
- keep off (something)
- keep a straight face
- keep quiet
- keep one's eyes open
- keep (someone) up
- keep one's head above water