The news that he failed in the exam _______ his unhappiness this morning.
Peter’s mother kept telling him that he should give up smoking, but _____ didn’t help.
It’s quite different from _____ I read last month.
Three-fourths of the homework _____ today.
When you want to write a person’s biography(传记),you must find out _____ about his or her life.
Can you imagine _____ the work in twelve hours?