Can you watch TV_____ school nights?—Yes, but I have to be_____ bed_____ ten o’clock.[ ]

A tortoise can live ______ 150 years old. [ ]

The father is creative enough_________ so many nice toys for his daughter.

He is so careless that he always ________his school things at home.

Look at the boy running on the playground. Is it David? —It ______ be him. I saw him go to the teachers’ office just now.