Ex.3 p.36 writeyour answers 1)what should you do to get to school? 2)what must we do when the traffic lights turn red? 3)whencan a child walk? 4)who may come to your place in the evening?

1) I should be careful on the road. 2) We must wait until the traffic lights turn green. 3) a child can walk in the day-time. 4) parents and relatives may come to my place in the evening.