Đặt câu hỏi cho phần gạch chân

1.   They have studied for three hours.
      ______________
2.   The students usually play football after the class.
      _______________
3.   Minh goes to the karate club three times a week.
      __________________
4.   Iam meeting Andy at the cinema.
      __________________
5.   Pelé scored 1,281 goals in his 22-year career.
      _________________
6.   Vietnam is in Asia.