—Trees are our friends. We should ______ them. —I agree with you. A. protect B. forget C. leave
--- 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.