您要查找的是不是：
- You must buy a modem. 你要买一个调制解调器。
- You must buy a tie to match with your new suit. 你必须买一条与你新西服相配的领带。
- When you get on a bus, you must buy a ticket. 上公共汽车时,要买票。
- You must buy a $10 permit to be allowed to install a burglar alarm. 你必须花10美元购买许可证才能被允许安装防盗器。
- I must buy a tube of toothpaste. 我必须买一支牙膏。
- You mustn't buy a pig in a poke. 你不要不问好坏地乱买东西。
- If you buy a car, you must have it insured. 如果买汽车你必须将其保险。
- I must buy a packet of cigarettes. 我得买一包香烟。
- If you must buy one suit, make it grey. 如果你一定得买一套西装;买浅灰色的.
- I must buy a new suit. This one is worn out. 我要买一套新衣服，这套已穿坏。
- You must buy it in mobile phone regie store. 你必须到手机专卖店去购买。
- I must buy a kilo of coffee today. 我今天得去买一公斤咖啡。
- She said she must buy a new car. 她说她一定要买辆新车。
- I must buy a new pen because this one is broken. 我必须买一枝新钢笔，因为这一枝坏了。
- I guess you must have bought a lot from him? 我猜想你一定从他那儿大量购买了吧?
- You must buy cakes with your own pocket-money or do without. 你必须用零花钱买糕点，否则的话就只好将就了。
- You must buy the book with your own pocket-money or do without. 无需你必须自己掏腰包买这本书，要不就别买了。
- It you want to make money, you must buy cheap and sell dear. 如果你想赚钱,你必须便宜的买进昂贵的卖出。
- Does your computer have a modem? 你的电脑有调制解调器吗？
- If you want to make money, you must buy cheap and sell dear. 如果你想要赚钱，你必须贱买贵卖。
