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Exercise: "Must (not)" and "(do not) have to"

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  • Exercise: "Must (not)" and "(do not) have to"

    Choose the correct completion according to the meaning.

    1. Soldiers ………….disobey a superior officer.
    a. must/have to
    b. must not
    c. don’t have to

    2. To stay alive, people ………….breathe oxygen.
    a. must/have to
    b. must not
    c. don’t have to

    3. You ………….finish your work on this project before you go on vacation. You’ll probably lose your job if you don’t .
    a. must/have to
    b. must not
    c. don’t have to

    4. If you have an aquarium, you ………….give your tropical fish too much food or they’ll die.
    a. must/have to
    b. must not
    c. don’t have to

    5. To be a successful mountain climber, you ………….have a great deal’ of stamina.
    a. must/have to
    b. must not
    c. don’t have to

    6. Thank goodness we ………….eat fish again tonight. Dad didn’t catch any today.
    a. must/have to
    b. must not
    c. don’t have to

    7. You ………….exert yourself. You’re still not fully recovered from your surgery.
    a. must/have to
    b. must not
    c. don’t have to

    8. My room is a mess, but I ………….clean it before I go out tonight. I can do it in the morning.
    a. must/have to
    b. must not
    c. don’t have to

    9. We really ………….help Marge move to her new apartment over the weekend. Not only is it too difficult for one person, but she still has her arm in a sling from her shoulder sprain a week ago.
    a. must/have to
    b. must not
    c. don’t have to

    10. Bill is in the darkroom developing the negatives of the photos he took on his last trip to Peru. You ………….open the door while he’s there because the light will ruin the pictures.
    a. must/have to
    b. must not
    c. don’t have to


    (Tư liệu tham khảo: Betty Schrampfer Azar. Understanding and Using English Grammar.3rd ed).
    Key
    Sửa lần cuối bởi vip.pro.11; 24-03-2017, 15:32.
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