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
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