caption: Complete the text using the Past Simple or the Present Perfect tense
exif: {"Image DocumentName": "Complete the text using the Past Simple or the Present Perfect tense", "Image ImageDescription": "London has had (have) an underground train system since the 19th century. The London Underground ________ (start) in 1863, when engineers and workers ________ (build) the Metropolitan railway. This railway line ________ (go) from Paddington Station to Farringdon Street Station. It ________ (be) a very short line. Eight more lines ________ (open) since then. The world\u2019s first electric railway ________ (open) in This line ________ (go) from the city centre to South London. The most modern line is the Jubilee line. It ________ (open) in Since the London Underground ________ (begin), many other cities, like New York and Moscow, ________ (build) their own systems.", "Image XResolution": "200", "Image YResolution": "200", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}