Select appropriate preposition to fill in the blank :
They walked _____ the footpath until they came to a bridge.

Question

Select appropriate preposition to fill in the blank : 
They walked _____ the footpath until they came to a bridge.

Accepted Answer

The correct preposition to fill in the blank is "along," which is Option 3. Here is a detailed explanation justifying why this is the correct choice, along with reasons why the other options are incorrect:

1. **Explanation for Option 3 ("along"):**
   - The preposition "along" is used to indicate movement in a line or direction parallel to something. In this context, "They walked along the footpath" suggests that the individuals were moving in the same direction as the footpath, following its course until they reached a bridge. This usage is appropriate because footpaths are typically linear paths that one can walk alongside or follow.

2. **Explanation for why other options are incorrect:**
   - **Option 1 ("into"):** The preposition "into" implies movement from the outside to the inside of something. For example, "They walked into the house" means they entered the house. In the context of a footpath, "into" would not be suitable because a footpath is not an enclosed space that one can enter.
   
   - **Option 2 ("since"):** The word "since" is primarily used as a conjunction or preposition to indicate time, meaning "from a past time until now" or "because." It does not describe spatial movement or direction, making it inappropriate for describing the action of walking on a footpath.
   
   - **Option 4 ("in"):** The preposition "in" is used to indicate being inside or within something. While it can sometimes describe being on a surface (e.g., "in the park"), it does not convey the idea of following a path or direction. Therefore, "in the footpath" would not accurately describe the action of walking along the path.

In summary, "along" is the most suitable preposition for this sentence because it accurately describes the action of moving in the same direction as the footpath, which is the intended meaning in this context.