You __________ buy a gift, but you can if you want to.

—Mom, can I have that transformer?—Behave yourself and you____ have it．

—— Where is your father?  —— He has gone to the supermarket. He __________ at home.

─ Look, Stella is there!─ That ______ be her. She doesn’t like singing.

–Is there an express to Beijing tonight? -- There ______be , but you’d better call the booking office to make sure.’