UNIT 20: HAVE TO, DON'T HAVE TO, MUST, MUSTN'T（必须、不必与禁止的表达）20 questions · 全部题目
所有题目已展开，可以随时修改答案；完成后统一提交。
Exercise 1 · Exercise 1
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You _____ apologise; it isn't necessary.
Exercise 1 · Exercise 1
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You _____ tell the boss what happened, or he'll fire you.
Exercise 1 · Exercise 1
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I _____ wear a tie; I do it because I like wearing ties.
Exercise 1 · Exercise 1
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You _____ smoke in here; smoking is not allowed.
Exercise 1 · Exercise 1
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I _____ be late. It's the most important meeting of the year.
Exercise 1 · Exercise 1
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You _____ go now; you can stay a bit longer.
Exercise 1 · Exercise 1
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Visitors to the zoo _____ feed the animals.
Exercise 1 · Exercise 1
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You _____ drive so fast; we have a lot of time.
Exercise 1 · Exercise 1
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We _____ cook more; there's enough food.
Exercise 1 · Exercise 1
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You _____ put salt in her food; the doctor said she can't eat salt.
Exercise 2 · Exercise 2
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I _____ leave early because I wasn't feeling well.
Exercise 2 · Exercise 2
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You _____ do something to solve this problem.
Exercise 2 · Exercise 2
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I don't like these clothes, but I _____ wear them at work.
Exercise 2 · Exercise 2
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Teacher: 'You _____ arrive on time for class.'
Exercise 2 · Exercise 2
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We didn't have money, so we _____ find a cash dispenser.
Exercise 2 · Exercise 2
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You ____ tell anyone; it's a secret.
Exercise 2 · Exercise 2
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_____ pay for the car repair or did the insurance cover it?
Exercise 2 · Exercise 2
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We ______ leave now; it's 10 and the conference doesn't start until 12.
Exercise 2 · Exercise 2
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We had an accident, but it was OK, we _____ go to the hospital.
Exercise 2 · Exercise 2
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The doctor has put me on a strict diet. I _____ eat more fruit and vegetables and do more exercise.
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