XI. a) Fill in preposition» wherever necessary:
Please remember: traffic... Britain keeps... the left! So when crossing a street look right first then left. If possible cross... zebra crossings, sometimes indicated... flashing orange lights... either side... the road.
Speed limit... Britain is 70 mph (= miles per hour);... built-up areas 30 mph. Careful riding is essential as there are many narrow and winding roads.
Roads... fast long-distance driving are called motorways. The best known is the motorway... London and Leeds. Road signs are mostly the same as those used... the continent. The same goes... traffic lights.