The survey shows that 200 students do different things during their vacations. ______ of them take classes according to the survey.

The girl was born _____ the morning of May 1, 1991.[ ]

______is your Chinese teacher?——Mr. Zhang is.

We should pay close attention to safety in schools because of frequent reports about accidents ____ students got injured or killed while in school.

We find ______ fast and comfortable to travel by plane.