Fill in the gaps with correct affirmative forms of the verbs in the brackets.
If you can’t remember how to form sentences in Present Continuous check Present Continuous Page
The biology teacher (explain) a difficult concept.
Some students (take) notes during the lecture.
The headmaster (speak) in the assembly hall.
A few classmates (prepare) for the final exam.
The whole class (listen) very carefully.
Two boys (argue) in the corridor.
The librarian (organize) the new books.
The football coach (show) a new technique.
My best friend (write) an essay.
The university professors (grade) the papers.