33 Hennepin’s account of his visit to Niagara Falls
34 What caused the event that happened at the Falls in 1848?
35 Roebling’s bridge was remarkable because
36 What causes the water of the Falls to be foamy?
33 B: Hennepin’s description is significant for the fact that it dominated the collective imagination of the Falls [= influenced many people’s impression of the Falls].
Distraction: A: he overstated, not understated the scale of the Falls;
C: The illustration was mentioned but not that it conflicted;
D: criticism by locals at the time is not mentioned – his description ‘turned out’ (later) to be a wild exaggeration.
34 C: A natural phenomenon caused the source of the falls to be blocked [= This phenomenon occurred due to strong westerly winds keeping water in Lake Erie, along with an ice jam that dammed the river near Buffalo, New York].
Distraction: A: workers from the Maid in the Mist took advantage of the situation but did not cause the falls to stop;
B: Tourists came to look but that was not the cause;
D: Engineers held back the Falls in 1969.
35 D: It was the first bridge of its kind [wire suspension] to carry a train [= no bridge of this kind had everdone this]. Distraction:
A: While the bridge had two levels, this is not what made it remarkable;
B: the cost is mentioned ($450,000) but not how expensive that was;
C: it was not the first bridge across Niagara Falls.
36 A: A combination of naturally-occurring substances [= The foam in the water at the base of the Falls is not a man-made phenomenon. It is actually calcium carbonate from the mist as it evaporates while going over the Falls. This mixes with decaying diatoms and other algae to produce the foam].
Distraction: B: we know the water drops from a height (para A)
but it is not stated that it affects the water’s colour;
C: downstream is mentioned but not that there are problems upstream;
D: pollutants used to be a problem but this not the case today.