The inspector ___________ the group sitting behind the shed and took them by surprise.a) walked upb) walked intoc) walked awayd) walked up on

To determine the correct answer for the sentence "The inspector ___________ the group sitting behind the shed and took them by surprise," we need to analyze each option:

1. walked up - This phrase suggests that the inspector approached the group, which fits the context of taking them by surprise.
2. walked into - This suggests entering an area. It can imply a surprise, but it doesn't work as smoothly with the context of "behind the shed."
3. walked away - This indicates a departure, which contradicts the context of taking someone by surprise.
4. walked up on - Though this can imply surprise, it typically requires a specific situation that isn't as clear here.

Conclusion

The most suitable option is a) walked up, as it effectively conveys the idea of the inspector approaching the group unexpectedly.

Final Answer

The inspector walked up the group sitting behind the shed and took them by surprise.