Misc: What is Montreal's subway known as?

Questions

Which Glen in Central Scotland between Loch Katrine and Loch Achray was popularised by Sir Walter Scott?

Which Frenchman supervised the building of the Suez canal?

Who composed the Opera Boris Godunov?

Which 20th novel, made into a film, concerns the friendship of a teacher called Fielding and a doctor called Aziz?

Which process invented in 1855 converts pig iron into steel?