The flowers in my room         every day, or they’ll die.

She can hardly write her own name, ______?

 —Did you ask Tom for help?—I ________. —I managed perfectly well on my own.

－I’d like to help the homeless people in the earthquake. －You ________ join a volunteer group. 

---Look. The man at the gate _____ be our headmaster. He is always standing there every morning.---No. it ____ be him. He is having a meeting in the office now.