—Sorry,Mum, I lost my key to the bicycle again.—Oh! How you be so careless! You have to learn to look after your belongings.
–Did Ken take the job in the bookstore? –No, but I think he _____.
He _____ more than thirty.
A computer _____ think for itself; it must be told what to do.
You _____ to eat if you don’t feel like it.
How _____ you say that you really understand the whole story if you have covered only part of the article?