Mr Randall and warning are the two words that make up the complete subject.
Step-by-step explanation:
“Mr Randall canceled the picnic because of the thunderstorm warning”.
Mr Randall and warning are the words that make up the complete subject. The complete subject is defined as simple subject and the words that modify or describe it.
Each and every sentence is made of two basic parts like the complete subject and the predicate. The complete subject contains the main noun in the sentence. The predicate contains the verb or action in the sentence.