Fill in the blanks with suitable Prepositions: The bridge is constructed ____ the canal.

The preposition “over” is appropriate for the sentence “The bridge is constructed ____ the canal,” as it indicates the bridge spans above the canal, connecting two sides. In English, “over” is used for structures like bridges that cross over water bodies or obstacles. Options A (across, used for crossing on a surface), C (along, indicating parallel movement), and D (beside, meaning next to) are less precise, making “over” the correct choice for this context.