posted by John .
a. Interest in English class
b. Interest according to each skill
c. The most difficult part among 4 skills
d. Interest in the most important part among 4 skills
e. Studying English after school
f. Understanding in the classroom
g. Study materials (all)
h. The use of study materials
i. View on the process of English class
j. Favorite type of activities
Are they suitable for the titles of questionnaire
I'm not sure what you mean. You're looking for ONE that will serve as a title for a whole questionnaire? Or are these intended to be sections of questions in the questionnaire?