Exercise 1. Choose A, B, C or D to complete each of the following sentences.
1.    Young people _____________obey their parents.
A. must        B. mustn’t         C. will        D. won’t
2.    Leave early so that you _____________ miss the bus.
A. didn’t        B. shouldn’t        C. won’t                   D. mustn’t
3.    You _____________ write them today. Because tomorrow ______ be busy.
A. should/ will                 B. should/ is        
C. will/ should                     D. should/ won’t         
4.    I hope I _____________ find it.
A. should        B. will        C. must        D. shouldn’t
5.    Unless he runs he _____________ catch the train.
A. will               B. should        C. mustn’t                 D. won’t
6.    We ___________________ have time to help you tomorrow.
A. should                B. will        C. must                   D. could.
7.    “_____________ you hand me that pair of scissors, please?”
A. Must                     B. Shouldn’t        C. Will                      D. Should
8.    Don’t go out. It _____________ rain.
A. must            B. should        C. mustn’t                 D. will
9.    You _____________wash your hands often with soap and water for at least 20 seconds.
A. will               B. should        C. mustn’t                 D. won’t
10. You look tired, so I_____________ bring you something to eat.
    A. will               B. should        C. must                 D. won’t