Question

The following sentence contains _____.

It is not right to make a promise unless one is sure he can fulfill the promise.

one adverb clause
two noun clauses
two adjective clauses
one adverb and one adjective clause

Answer 1

I Would say that the most suitable option is 4 one adverb and one adjective clause.

ln fact, it is possible to find 3 clauses within this sentence:
1° It is not right to make a promise (independent clause) 
2° unless one is sure he can fulfill the promise. (dependent clause). and 3° he
can fulfill the promise (dependent clause within the other clause) 
Let´s take the most prominent clauses: number 1 would be the adjective clause because of the 'right and n° 2 would be the adverbial clause because it is modifying the adjective clause. 


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