After the summer vacation, the professor, together with his fellow teachers, ______ the scientific experiment
The young man, who had rushed into the fire to save the old man, _____ rewarding.
One should stick to ______one has begun.
It’s because he is in a hopeless situation, ______we will keep a very close eye on, ______ he looks depressed.
_____merely on what the average is , and you’ll remain average.
No student ______ go out of school for snacks during the break without the teacher’s permission.