Understanding Conjunctions and Prepositions

I have been in such a picke since I saw you last. In the above sentence the word "Since" is a:

Answer: Preposition
Explanation

We use since from a particular time in the past until a later time, or until now.

This question appeared in Past Papers (1 times)
Junior Clerk Past Papers (1 times)
This question appeared in Subjects (2 times)

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