33 Hennepin’s account of his visit to Niagara Falls

• A understated the scale of the Falls.
• B influenced many people’s impression of the Falls.
• C conflicted with the illustration that accompanied it.
• D attracted criticism from locals at the time it was written.

34 What caused the event that happened at the Falls in 1848?

• A A transport company was able to assess the volume of water.
• B The tourist industry took action in order to attract more people.
• C A natural phenomenon caused the source of the falls to be blocked.
• D Engineers held back the falls in order to complete their research.

35 Roebling’s bridge was remarkable because

• A it consisted of two separate levels.
• B it was inexpensive for a bridge of its kind.
• C it was the first bridge built across the Niagara Falls.
• D it was the first bridge of its kind to carry a train.

36 What causes the water of the Falls to be foamy?

• A A combination of naturally-occurring substances.
• B The pressure of dropping from a height.
• C A problem further up the river.
• D Pollution from industry