—I hear you run for half an hour every day. —Right, we have to. It is one of the ______ in our school.
--- Could you tell me _____ ? --- Because she likes her students very much.
---_____you _____ out the problem, Sam? --- Not yet, but I’m going to.
--- Some of the plastic bags can’t ______ after June1. --- Yes, people will use environmental bags instead.
--- All the clerks went home _____ Mr. Wang. Why? --- Because he had to finish his work.
--- Can you_____ your little brother? I’m busy now. --- OK. I’ll do it right now.