She is a ________girl，and she does everything________．

---Why do you keep the windows open on such a cold day? ---There are so many students here, so we want to keep the air nice and __.

The piano sounds             . I want to leave now. Where is the exit(出口)?

I’d like to eat these candies. They taste _________.

—Do you enjoy traveling by air?     —No, it’s ________ expensive.