1.To beat one’s head against the wall.
例句：You’re wasting your time trying to figure this puzzle out. You’re just beating your head against the wall.
2.Sight for sore eyes
例句：Oh, am I glad to see you here! You’re a sight for sore eyes.
3.Pain in the neck
例句：My little sister won’t leave me alone. She’s a real pain in the neck.
4.To wash your hands off (something/someone)
例句：That car was a real headache. I washed my hands of it long ago.
5.Weak at the knees
例句：The very thought of jumping out of an aircraft with a parachute made him go weak at the knees.
6.Cast iron stomach
例句：If I didn’t have a cast-iron stomach, I couldn’t eat this stuff.
7.Land on your feet
例句：It may take a few months to get a job, but I’m sure you’ll land on your feet.
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