can't ; needn't; mustn't; must

(1)

—Look! There are so many people in the restaurant.
—Yes. The food there be delicious.

(2) I promise anything, but I'll do what I can.

(3)

—Must we clean the classroom now?
—No, you . You can clean it after school.

(4) You play with fire. It's so dangerous.

【考点】

need的用法; can, could表示能力; must, have to表示必须; must表示推测;

【答案】

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选词填空（多句）普通