Complete the following collocation.

It is easier to make a promise than to ______ a promise.

keep

The correct answer is keep.

The saying "It is easier to make a promise than to keep it" is a proverb that means that it is easier to say something than to do it. It is often used to warn people against making promises that they are not sure they can keep.

The other options do not make sense in the context of the saying.

• "Maintain" means to keep something in good condition. It does not make sense to say that it is easier to make a promise than to maintain a promise.
• "Follow" means to obey or to do what someone says. It does not make sense to say that it is easier to make a promise than to follow a promise.
• "Justify" means to show that something is right or reasonable. It does not make sense to say that it is easier to make a promise than to justify a promise.