您要查找的是不是：
- Castles in the air cost a vast deal to keep up. 空中樓閣，要有一大筆費用來維持。
- You can't keep up the pretence any longer. 你不能再假裝下去了。
- He can keep up until ten o'clock tonight. 今天晚上他能堅持到10點鐘不睡。
- I hope the fine weather will keep up. 我希望好天氣繼續下去。
- Slow down I can't keep up (with you)! 慢點，我跟不上(你)了！
- You can keep my book as long as you like. 我的書你要借多久都隨你的便。
- Please keep the watch for me while I go swimming. 我去游泳，請代我保管這表。
- They sang songs to keep their morale up. 他們唱 歌以保持高昂的士氣。
- She likes to keep up with the latest fashions. 她喜歡穿戴入時。
- Keep it up! Final victory is in sight. 堅持下去！最後勝利已經在望了。
- A pianist has to practice every day to keep up to scratch. 鋼琴手要天天練習才能保持高水平。
- Some boys wear suspenders to keep their trousers up. 有些孩子使用背帶來吊住褲子。
- Prices keep going up to even more impossible levels. 物價不斷上漲，漲到不可思議的地步。
- Mother set the pace so that her children would keep up with her. 媽媽定了速度好讓她的孩子們能夠跟上她。
- It was very thoughtless of you to keep her waiting so long. 你讓她等那麼久也太不體諒人了。
- It's important for the college freshman to keep his nose clean. 對大學新生而言潔身自好是很重要的。
- The government is trying to keep a low profile on this issue. 政府力圖在這個問題上保持低姿態。
- If you keep practicing like that you'll soon be up with me. 如果你堅持那樣練習，你很快就會趕上我的。
- Please keep the cards in sequence; don't mix them up. 請把這些卡片按次序放好，別把它們攪亂了。
- Keep away from that house. They have scarlet fever. 不要接近那一家，他們在患猩紅熱。
