Hal
which pronoun correctly completes the sentence?
johnny and are building the rocket for the demonstration next month.
a. me
b. i

The proper use of a pronoun in this sentence would be b. johnny and I. Hope this helps! 

Adjective clauses  begin with words such as that, when, where, who, whom, whose, which, and why. an essential (or restrictive)  adjective clauseprovides information that is necessary for identifying the word it modifies. so for example*** wrong= i the man gave me direction. example right ( i the man who gave me the  direction.