Statement: Another strange thing I noticed last night was that the lights of the drawing room were on. Assumptions: I. A thief must have come in. II. Usually, the drawing room lights are off at night.
Correct Answer: if only assumption II is implicit.
Explanation:
I is not an assumption. It is an inference being drawn out of the "strange thing". But assumption II is implicit. It is this departure from the usual that makes "last night" strange.
