Do you know ________ the maths problem

How did your students express their thanks to you on Teachers’ Day? — A gift, together with many flowers ______ sent to me by my students

____, he does not know the answer.

I need some help. Can you _______ the bananas for fruit salad— Yes, Mum. But where’s the knife

It’s nearly eight o’clock. They______ be here at any moment.