Peter could hardly see the words on the blackboard, ________?
The Bunsen Burner is so named because it is thought ___________ by Robert Bunsen.
He is late _____the meeting yesterday. [ ]
3- junior high school life will be over . I will remember those things and teachers ____ are unforgotten .
“There is ______ in today’s newspaper, so you needn’t read it,” the father says to his son.