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Answer:
Sherlock Holmes is extremely skilled in logic, deduction, and reason. John Watson is skilled in medical knowledge. Watson gives Holmes the insight of a doctor and Holmes is able to solve puzzles better than Watson is. Watson also provides Holmes a person to explain his theories to, which helps Holmes recognize holes in his theories. As far as I can tell, there are no characteristics that they are lacking that would help them in detective work.
The complete predicate of this sentence would be "The temperature reached 115 degrees." Hope this helps :)