当你上课迟到了,站在门口时你要说:A.Open the door, please. B. May I come in,please?
Is this factory ______you visited last week?
They won’t allow us ________ at this beach.
We need fifteen more people _____our team to do the job.
He _________ Alice for ten years.
He lives in a village _____there are a lot of trees.