Tom graduated from college at a very young age.—Oh, he ______ have been a very smart boy then.[ ]

Mr. Smith, Millie’s homework isn’t here.— Well, let her _____ it here tomorrow.

Hello! May I speak to Mr. Smith, please—________. I’ll go and get him.

Interest is of great importance when we choose a major. Only if we are interested ______ our heart into our work. [ ]

I have to see the doctor because my stomach ________ badly.