My family _______ all at home today(今天).
---I am going to Mount Tai on Sunday with my parents.---____________
The girl is young. She doesn’t know the way ______ home.
---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.