–-You should be _______ careful when you take the chemistry exam.---I agree. In this way, I will make _______ mistakes.
Hurry up,or you ________ catch the train.
—Must I hand it in today? —No,you ________.You can do it tomorrow. A.mustn’t B.can’t C.needn’t
Don’t drink the soup.It smells ________.
—What are the school rules? —We ________ arrive late for class.
—________ I finish my homework now? —No,you ________.Your work is over today.