The fact has worried the people across the world ___________ the earth is becoming warmer and warmer these years.
Tom. Why do you look so tired? — Because I often study late ______ 10 o’clock at night.[ ]
How often does he go to the Swimming Club? —________.
______ is your sister Linda?— She’s thirteen.[ ]
Mrs.Wang has____8-year-old daughter who has ____ gift for dancing and singing.