— Is this book yours? —No, it’s not ______. It’s Betty’s.
—Excuse me,could you tell me________a book about science?—Sure.They are on the second floor.
A________day!Don’t you want to go out for a walk with us?
I hear it’s a________experience to visit the caves and many people go there every day.
The hamburger not only smells good but also tastes________.
Don’t open the door to strangers;it’s not________.