I have a tight budget for the trip, so I'm not going to fly _ the airlines lower ticket prices.
My watch is under______, so they’ll repair it for free.
Although he is not rich, he______various different charitable organizations.
_____ yourself stand out at a party, you should play some funny games.
---Would you like something about my foreign teacher? ---Oh,I remember _____ about her yesterday.
When children start smoking, they don’t realize that they are risking_____ their health.