You should add a comma after an adverb in the beginning of the sentence.
Ex. Fortunately, he made it in time.
Hurriedly, she rushed to the station.
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Answer:
The 5 answers are
Explanation:
1. Law of superpostion
2. younger than
3. principle cross-cutting relationships
4. younger than
5. mass spectrometer
Suppose
Here's a link to help you further
http://writingexplained.org/suppose-vs-supposed-difference
3.
Sara has thought of an innovative and creative solution to a problem she was facing.