-Someone’s knocking at the door. Is it your mother?-No, dad. It _____be mom. I saw mom ____in the bedroom just now.
Daniel is ________ to solve this problem, I believe.
Can you _______?
Can you find a way of __________ this problem?
The boy promises _________ late for school again.
—Do you know _____ the soldiers came to Yingxiu Town? —The roads were badly broken. They had to walk there.