Hospital staff burst into cheers after doctors completed a 20-hour operation to have_______ one- year-old twins at the head.
____, he does not know the answer.
---Do you know what Tom does all day? ---I know he spends at least _______ time watching TV as he does spend doing his lessons.
Jessica ought to stop work.She has a headache because she _______ too long.
It was on a cold winter evening_______ his father left home and was never back.
Whoever leaves the room last must ______ that all the lights are turned off.