Question

The following sentence contains _____.

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

one main clause
two main clauses
one main and one subordinate clause
one main and two subordinate clauses

Answer 1

one main and two subordinate clauses.

Step-by-step explanation:

Answer 2

It is not right to make a promise unless one is sure he can fulfill the promise.
This sentence contains one main and two subordinate clauses.
The main clause is It is not right to make a promise, and the two subordinate clauses are unless one is sure and he can fulfill the promise.