The user is the most common problem and most common cause of other problems.
The most common ear problem is an ear infection.
The most common problem is inflammation or infection that mimics appendicitis.
The most common problem following an animal bite is simple infection
The most frequently identified problem in student reading is poor phonemic awareness. Often the child struggles with the structure of words and their sounds.
The most common ear problem is a ear infection which can be treated at your local doctors office.
Yes, student is a common noun.
The most common problem I encounter is copper pipe corrosion. A close second is worn seats in taps.
prostitution - this is common. drug addiction - well, the most common. ask your friend.
Relationship to student can mean a few different things. The most common interpretation is just how a person knows the student.
The most common problem is that not enough steam is produced.