GMAT sentence correction questions tests more than one grammar point. Therefore, you need a systematic approach.

How to solve sentence correction questions

Read the sentence carefully and try to spot an error.

If you can find an error, eliminate the answer choices that contain the same error. (This often removes two or three choices.)

Go though the remaining choices to find a second error and fix that.
If you cannot find an error consider option A.

Finally read the whole sentence with the option you are selecting in place.

Practice questions for GMAT sentence correction

1. Making use of contemporary diaries and letters, Florey’s complexity is brilliantly revealed by Lax.

A. Florey’s complexity is brilliantly revealed by Lax
B. Florey is brilliantly shown in all his complexity by Lax
C. Lax brilliantly reveals Florey’s complexity
D. Lax brilliantly revealed the complexity of Florey
E. Lax’s study has brilliantly revealed the complexity of Florey

2. One of the perennial problems of the tourist industry is that of fitting what people want to see into the time they have available to see it in.

A. that of fitting what people want to see into the time they have available to see it in
B. fitting what people want to see into the time they have available
C. that of fitting what people want to see in the time which they have available
D. fitting what people want to see in the time they have available for seeing
E. the need to fit what people want to see into the available time for seeing

3. If the engineering feats of that early decade remains impressive – boring a mile-long tunnel through a solid mountain, and turning the eastward flow of two rivers westward – the arduous conditions in which the engineers worked are no less remarkable.

A. If the engineering feats of that early decade remains impressive – boring
B. If the engineering feats of that early decade remains impressive – such as the boring of
C. Although the engineering feats of that early decade remains impressive – boring
D. If the feats of engineering in that early decade remains impressive – boring
E. If the engineering feats of that early decade remain impressive – boring

4. The United Nations’ Human Development Index takes into account life expectancy, education, as well as income per person.

A. into account life expectancy, education, as well as income per person
B. life expectancy, education, as well as income per person into account
C. into account life expectancy and education, as well as income per person
D. into account life expectancy, and education, and income per person
E. life expectancy, education, and income per person in its account