If students study hard for their math exam, they will pass. If someone has trouble seeing the blackboard, they need glasses. If someone sunbathes every day during the summer, they will get a tan by the end. If someone attends a birthday party, they should bring a present. If a person sees a snake, they will shout loudly because snakes scare them. There is a superstition that if you break a mirror you will have seven years of bad luck. You need a driving license to drive a motorbike legally. Drinking coffee in the evening will prevent sleep. Brushing teeth every day is important to avoid cavities.