Fill in with: don’t need to, could, must, shall,
should.
1 I’m sorry sir, but you …………………….. switch
off your phone during take-off and landing.
2 …………………….. we go shopping this
afternoon? I need to buy a new dress!
3 I really think you …………………….. tell her the
truth.
4 You …………………….. cook today as we are
going out for dinner.
5 Sally …………………….. play the piano very well
when she was a music student.