We should pay close attention to safety in schools because of frequent reports about accidents ____ students got injured or killed while in school.
Xi’an was the last city ______ he visited when he came to China.
The music ______ she is dancing sounds beautiful.
______ time ______, what the scientist said finally proved to be true.
Mary never does any reading in the evening, __________.
— Where is the panda? — It __________ by the doctor now.