I prefer a school ______teachers have to work as a team, instead of fighting against each other

It’s high time that we students ______ even harder atour lessons as the national entrance examination is coming nearer.

Keeping your body yourmental health.

________ did you tell Jim about the news, Clara— By ________ an e-mail.

Is it John that is being scolded in themanager’s officeNo. It ______ be him. I saw him on the wayjust now.