Having checked the doors were closed, and ___ all the lights were off, the boy opened the door to his bedroom.
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?
Thirty years later, the old hero returned to the small town_____ he grew up as a boy.
-Your phone number again? I_____ quite catch it.- It’s 695-8442.