Answer:
Compound sentence
Explanation:
A compound sentence is a type of sentence that contains an independent clause joined by a comma, or semicolon.
Therefore, from the given sentence, "Whenever the clock struck midnight, Cinderella lost her slipper", we can see that the sentence has an independent clause which is "Cinderella lost her slipper" which is joined to another clause with a comma.
Something is certain to happen or informally, one would expect (predictable)
Explanation:
The sailboat, moored in the harbour, suffered damage during the hurricane that swept through our area in the past few days