一 is Tom’s mother?一The one in red.
— We finished counting all the birds, Miss Zhang. — ______ ! Boys and girls, let’s have a rest.
— Look! The girl with long hair is drawing a picture. Is she Sandy? — It ______ be her. I’m not sure.
We should do everything we can to protect the birds ______ danger.
-- Don’t cross the road when the traffic lights are red. -- .
–Let’s go hiking ________ staying at home, shall we? -- Good idea.