The students can answer the questions with just one or two words. The point of asking these questions is not to force the students to speak; rather, the questions are a method of checking comprehension while simultaneously repeating the target vocabulary in context. Therefore, students need not worry about speaking in full sentences, and indeed this would detract from the process of concentrating on the input provided by the teacher. By answering using single words or very short phrases the students can keep their attention focused on the words to be learned.