______ your teacher for your pen.
---It’s so hot. Why not ______ swimming?---It’s a good idea. Let’s go.
Please be careful when you walk ______ the street. There are so many cars.
---Does Cindy go to school by _____ bus?---No, she doesn’t. She takes ______ underground.
---____________?---Yes, I want some strawberries and apples.
I want two kilos of eggs. Here ______ 20 yuan.