In Vietnam, all motorbike riders ________ wear a helmet according to the law., A. must, B. have to, C. should, D. can, I ________ study very hard last night because I had a giant English test this morning., A. must, B. have to, C. had to, D. could, You ________ smoke in the hospital because it is strictly forbidden for health reasons., A. mustn't, B. don't have to, C. couldn't, D. won't have to, Tomorrow is Sunday, so we ________ wake up early to go to school or work., A. mustn't, B. don't have to, C. shouldn't, D. can't, When I was only five years old, I ________ swim across the pool without any help., A. can, B. will be able to, C. could, D. am allowed to, If you want to lose weight and stay healthy, you ________ eat more vegetables every day., A. should, B. had to, C. were allowed to, D. will have to, Next year, with the new technology, students ________ learn everything using virtual reality., A. could, B. was able to, C. will be able to, D. had to, At the museum yesterday, we ________ take photos because the light damages the old paintings., A. don't have to, B. shouldn't, C. weren't allowed to, D. won't be able to, I ________ remember to buy some milk on my way home because there is none in the fridge., A. must, B. had to, C. am allowed to, D. was able to, In the year 2075, people ________ drive cars because robots will do everything for them., A. mustn't, B. won't have to, C. couldn't, D. shouldn't, Last week, the weather was very nice, so we ________ stay inside the classroom for lunch., A. mustn't, B. had to, C. didn't have to, D. won't have to, To enter that building, you ________ show your ID card to the security guard at the gate., A. could, B. have to, C. should, D. were allowed to, My sister ________ speak three languages fluently when she was only ten years old., A. can, B. could, C. will be able to, D. is allowed to, You ________ touch that wire because it is extremely dangerous and you might get hurt., A. mustn't, B. don't have to, C. couldn't, D. shouldn't, If the rain continues to fall heavily, we ________ cancel the outdoor football match tonight., A. had to, B. were allowed to, C. will have to, D. could, Passengers ________ remain in their seats while the plane is taking off for their own safety., A. must, B. can, C. don't have to, D. shouldn't, When we were students, we ________ ask the teacher for permission before leaving the room., A. must, B. had to, C. will have to, D. are able to, You ________ try this new coffee shop downtown because their iced coffee is the best., A. should, B. have to, C. had to, D. are allowed to, Because I forgot my keys yesterday, I ________ wait outside for two hours until my flatmate arrived., A. must, B. have to, C. had to, D. can, After you finish this advanced course, you ________ use the laboratory equipment by yourself., A. could, B. were allowed to, C. will be allowed to, D. had to.

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