★Sleep through: ~の間中、眠り続ける
・I’m sorry I’m late. I slept through my alarm and missed my train.
・Janet was so exhausted she slept through her math class today.
★Head off to: (目的地、目的とする対象)に向かう
・The family is heading off to the beach for a week-long vacation.
・I'm heading off to college next month, so I'm trying to save up as much money as possible.
★Freshen up: さっぱりする、~をリフレッシュさせる
・I'm going to freshen up and change my clothes before we go out.
・The garden was looking a little neglected, so I freshened it up with some new plants and a small fountain.
・(n.) Every time I cook spaghetti for dinner, there is always enough surplus to eat for lunch the next day.
・(adj.) Whenever I have surplus cash, I try to put it in my savings account instead of spending it.
・The letter makes no sense unless you first understand the context in which it was written.
・My words were taken out of context. I didn’t mean to cause offense.
・Reporters asked the politician for more details, but his answers remained ambiguous.
・The results were ambiguous, so another round of tests are necessary.
★Up in the air: 未定で、漠然とした
・Until I check the weather forecast, my plans are up in the air.
・My work schedule is up in the air until we get our computers fixed.
★(Keep) In the dark: 見当がつかないで、何も知らずに
・The citizens were kept in the dark until the official announcement was made.
・I am completely in the dark about early European history.