Whose handbag is this—It _________be Li Ping’s. I saw her take hers away just now.

He didn’t work hard and_________ he couldn’t finish his task on time[ ]

Have you got________books for the train journey?

Don’t ask him how he is because if hestarts talking about his health you’ll never_______ him.

Some scientists have questioned the theory ______ CO2 is causing dangerous global warming.