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Check your grammar: Modal verbs 1. Complete the sentences with modal verbs.should/must.Modal veyou shouldannoe.g. I thinkknowabout priority organiser. It's good foryour future plans.1. Studentsbehave wellwhen they're in class.2. If you drive a car, youstop at marked crossings.3. I think waiterstry to bepleasant with customers.4. Some workerswearhelmets because their jobs areconsidered to be dangerous.5. If you feel sick, youstayat home. It's better for you.