What sentence contains a punctuation error?

Question

In addition to the lectures, students will be required to attend one practical class each week.

After you have read the texts, you should list new words, summarise main points and answer the questions.

Prof. Manase, the head of the department, is available to answer queries about the language course.

This semester we will work on vocabulary, the focus of next semester will be creative writing

Answer 1

This semester we will work on vocabulary, the focus of next semester will be creative writing.