Choose the best option to replace the underlined part to improve the given sentence. If no substitution is required, select 'No substitution.'
I watched the paper boat float on the canal towards the lake.
Show answer & explanation
Correct answer: A
Explanation
The sentence describes a boat moving along the length of a canal towards a specific destination (the lake). The preposition 'down' is commonly used to describe traveling along a river or canal in the direction of the current or towards a destination.
'On the canal' is grammatically correct but less specific about the direction of movement.
'In the canal' is technically correct but implies the boat is submerged.
'Over the canal' implies the boat is flying above the water.