【正文】 D．must10．— Mom, must I clean my room now?— No, you ________. You can do it after dinner.A．needn’t B．mustn’t C．shouldn’t D．can’t11．We teenagers ________ have dreams. With dreams and hard work, anything amazing ________ be created.A．may。 should C．should。 has to12．—Have you decided to take up teaching as career after graduation? —I ________ go abroad for further education instead. But it depends.A．must B．should C．may D．shall13．Please don39。t B．can39。t D．mustn39。 dares to climbB．dare to say。 dares climbD．dare to say。t B．shouldn39。t D．can39。get used to it in winter.A．can’t B．needn’t C．mustn’t D．shouldn’t19．—Will your mother be at home this Saturday?—Hard to say. She _______go to the countryside to see my grandparents.A．must B．may C．can D．would20．I ________ hear you clearly. Would you please repeat it?A．mustn’t B．can’t C．needn’t D．shouldn’t21．Look at the floor, Tom! ________ you watch TV while having a meal?A．Should B．Could C．Must D．May22．According to the rule, used batteries ________ be dropped in the red bin for harmful wastes.A．may B．would C．should D．might23．You _________ smoke here! Look at the sign. It says No smoking.A．needn39。t C．can D．may24．—Suzy described every detail of the accident just now.—Her memory ________ be pletely back.A．shall B．need C．must D．could25．Never throw objects from the building. Even a small object ________ cause serious injuries, or death, when dropped from a great height.A．must B．should C．may D．need26．— Mum, why do I have to wash hands so many times a day?—You ________ be too careful, for your health.A．can’t B．mustn’t C．may not D．needn’t27．—Is it usually warm in Yancheng in May??—Yes. But it _______ be rather cold sometimes.A．must B．should C．would D．can28．You ________ pay too much attention to protecting yourself if you plan to go abroad.A．mustn’t B．can’t C．shouldn’t D．needn’t29．To avoid ________, we’d better ________ the parents’ meeting online.A．gather。 hold C．gather。 to hold30．—Must we stop the Japanese government discharging nuclear waste water (排放核污水) into the Pacific Ocean?—________. Because everyone should protect our earth and it is bad ________ us to eat the polluted seafood and drink the waste water.A．Yes, we can。 of C．Yes, we must。 for31．— What is that young lady’s job?— She ________ be a nurse, I’m not sure.A．must B．may C．need D．would32．— Excuse me. I haven’t finished reading the book yet. May I keep it a bit longer?— Sorry, you ________. You must return it on time.A．nee