Don’t lose your progress!

We cover every section of the GMAT with in-depth lessons, 5000+ practice questions and realistic practice tests.

Up to 90+ points GMAT score improvement guarantee

The best guarantee you’ll find

Our Premium and Ultimate plans guarantee up to 90+ points score increase or your money back.

Master each section of the test

Comprehensive GMAT prep

We cover every section of the GMAT with in-depth lessons, 5000+ practice questions and realistic practice tests.

Schedule-free studying

Learn on the go

Study whenever and wherever you want with our iOS and Android mobile apps.

The most effective way to study

Personalized GMAT prep, just for you!

Adaptive learning technology focuses on your academic weaknesses.

Sentence Correction: Parts of Speech - Articles

Japan, a group of islands situated on the circum-Pacific volcanic belt, has a high number of active volcanoes.

Incorrect.

This answer choice is grammatically incorrect. The article amount of can describe non-count nouns only whereas the noun volcanoes is a count noun.

[[snippet]]

Incorrect.

This answer choice is grammatically incorrect. The article amount of can describe non-count nouns only whereas the noun volcanoes is a count noun.

[[snippet]]

Incorrect.

This answer choice is grammatically incorrect. The singular subject Japan does not agree with the plural verb have.

What helps us identify this question as a Subject Verb Agreement question as well as identify the mistake is the following Stop Sign:

A long complex subject / a long distance between the subject and the verb

Incorrect.

Although this answer choice is grammatically correct, it creates a stylistic flaw. The phrase The country of Japan is wordy and, therefore, redundant.

You're right!

This answer choice correctly matches the article number of with the count noun volcanoes.

Japan, a group of islands situated on the circum-Pacific volcanic belt, has a high number
Japan, a group of islands situated on the circum-Pacific volcanic belt, has a high amount
Japan, a group of islands situated on the circum-Pacific volcanic belt, have a high number
The country of Japan, a group of islands situated on the circum-Pacific volcanic belt, has a high number
A group of islands situated on the circum-Pacific volcanic belt, Japan has a high amount