用情态动词can, may, must的适当形式填空。 1. —What _______ I do for you? —I want some apples. 2. My father _______ride a bike, but he _______ drive a car. 3. You are ill, Tom. You _______ see a doctor. 4. Children_______play football in the street. 5. If you are not careful ,a car _______ hit you. 6. —_______ I come in? —Come in, please. 7. A blind man(盲人)._______ see anything. 8. Please ask the policeman, for he_______know the way to the hospital, I'm sure. 9. -May I use your telephone? -No, you_______. |