【正文】 hen dropped from a great height.A．must B．should C．may D．need7．Our Chemistry teacher always tells us we ________ be too hardworking before the exams.A．mustn’t B．shouldn’t C．needn’t D．can’t8．Exercise is helpful but it ________ be regular (規(guī)律的) exercise.A．must B．may C．can D．need9．Sorry, smoking is not allowed here. If you ________ , you will be fined according to the rules.A．can B．will C．may D．must10．—Where is Tom? I am considering ________ him about the result of the exam.—Oh. You ________. He has known it already.A．to tell。t B．telling。t C．tell。t D．told。t11．You ________ be careful with the camera. It costs!A．can B．will C．should D．may12．It’s amazing that the pen ________turn voice into text with few mistakes.A．can B．must C．may D．need13．If you buy your mum an iRobot floor cleaner, she ________ sweep the floor every day.A．can’t B．mustn’t C．needn’t D．shouldn’t14．—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．shall15．Please don39。t B．can39。t D．mustn39。d better __________ hard from now on, __________ you will fail the exam.A．work。 or C．working。 or21．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’t22．— What is that young lady’s job?— She ________ be a nurse, I’m not sure.A．must B．may C．need D．would23．According to the rule, used batteries ________ be dropped in the red bin for harmful wastes.A．may B．would C．should D．might24．— Listen! Tom ________ be listening to the music while doing his homework.— Let’s go upstairs to remind him to turn it off.A．should B．could C．would D．must25．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．—Will Jim e to Yangzhou for a holiday?—He ________e and it depends on how much homework he will have.A．may B．should C．must D．need27．—In China, many parents plain that their children have to stay up late to do the homework. —Don’t worry. The government has realized the problem. I’m sure there ________ be good news soon.A．can B．should C．need D．must28．I think all the students love the weekends because, to them, they ________ get up early on Saturdays or Sundays.A．mustn’t B．don’t need C．needn’t D．can’t29．—Is it really necessary for me to go shopping with a mask on?—I’m afraid you ________ in public. It is not only to protect yourself but also to protect others.A．must B．should C．can D．need30．— Is the boy over there Tom? He often wears a jacket like that.— It