_______ you study harder, you’ll fall behind others.A. If B. Unless C. Until
The retired couple enjoy__________ photos.They always go out with their cameras.
Even Tony’s granddaughter,a five-year-old girl,asked him__________ smoking.
The official said they__________ a new law to protect the tourists the next year.
The schoolboy _________to the blind man on his Way home yesterday afternoon.
Look,so many passengers__________ with their smart phones on the underground.