－Why did you talk to the teacher after class?－I didn’t understand______________ during the lecture.

________ did you go to the hospital ________ yesterday— I went there to see my friend in hospital.

Actually, what you did ______ what you said made your parents disappointed.

When will the plane arrive Shanghai— the morning of March 13th .

A growing number of people are beginning to believe that learning new skills and knowledge _________ more promotion opportunities.