Fill in the blanks. use: should/shouldnt/must/neednt/have to. shall i buy some butter? -no,you . we ve got some. what i do to pass the chemistry exam? -you work hard and spend more time doing your homework. excuse me , i to trafalgar square. i take a bus? -yes.you take buss № 62.

Shall I buy some butter?-No,you ..neednt . . We ve got some.
What ..should . I do to pass the chemistry exam?-You ..must . work hard and spend more time doing your homework.
Excuse me , I .have to.. ...get to Trafalgar Square. .should .. I take a bus?-Yes.You ..must . take buss № 62.