Where did you go ____ vacation

Youjustthinkofyourself!Youkeptmewaitingforaboutthreehours. — Iamsorrythatyou_____thinkso. [ ]

Mr. Zhang that helped us out of the trouble. Without his help, we ______ itso easily.

we stood at the top of the building,the people below were hardly visible

Most of the students haven’t finished their papers on time for __________reasons—one of which was that they carried out a week-long investigation in the countryside.