______, you’ll never be able to persuade him.

I think I will be a college student ______ five years. [ ]

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

Hello, can I speak to Huang Yi, please?—Sorry, we don’t have ______________Huang Yi here, you dialed a wrong number.

What a nice bike! Is it new?—No. I have _________ it for 2 years.