Tom. Mary can’t open the box. can you give ______ a helping hand?

Do you know ______ girl in green? She is our monitor.

Is the man standing outside the teacher’s office Mr. Zhou? –No, it ______ be him. He has gone to Hong Kong for an academic conference.

Is your home ______ the park? —No, it’s ______ the park. [ ]

Take great pains to read _____ you can or you won’t have a better understanding oflife．