【答题库最新整理国开(电大)人文英语3-1379网上形考机考题库】Quizzes are part of the lecture program to keep students engaged and keep them _________, for students to be able to check that they understood what was covered.

【答题库最新整理国开(电大)人文英语3-1379网上形考机考题库】Quizzes are part of the lecture program to keep students engaged and keep them _________, for students to be able to check that they understood what was covered.
选择一项：
A. thinking
B. think a lot
C. to think
译文：测验是讲座计划的一部分，可以让学生参与进来，并保持思考，并且学生可以通过测验来检验自己是否理解了所考的内容。