1.   In my family, all of the children have to get up before 6 a.m. and do exercises.

      → ................................................................................................................................  (obliged)

      2.   Students have to book in advance to use computers at the school library.

      →  ............................................................................................................................ (necessary)

      3.   In most of the temples and pagodas in Vietnam, you have to take off your shoes when going inside the main worship areas.

      →  ...............................................................................................................................................

            ...............................................................................................................................  (allowed)

      4.   To visit Ho Chi Minh Mausoleum, people must hand in their identity cards.

      → ................................................................................................................................  (obliged)

      5.   In Vietnam, people must drive on the right of the road.

      →  .................................................................................................................................... (can’t)