| A | B |
|---|
| race against time | hurry to do something before a deadline |
| rack one's brain | to think very hard about something |
| rags to riches | situation in which a person rises from poverty to wealth |
| rain cats and dogs | downpour heavily |
| rain or shine | no matter whether the weather is good or bad |
| raise eyebrows | to cause surprise or disapproval |
| red flag | a sign or warning signal that something is wrong |
| red handed | be caught in the act of doing something wrong or illegal |
| ride shotgun | to sit in the front passenger seat of a vehicle |
| right on the money | to be exactly correct |
| roll one's sleeves up | to prepare for hard work |
| Rome wasn't built in a day | Important work takes time. |
| run out of steam | lose energy or enthusiasm |
| round the clock | something happening all day and all night |
| road rage | aggressive behavior exhibited by drivers in traffic |
