The Musashi University Vocabulary Builder for English Learners is now available here on the MCV website. After you login, click on the Resources drop down menu (picture below on the right) and select "Vocabulary Builder Quizzes". There is one business English quiz in that course now and more will be added soon. Use the quizzes in this course area to work on your English grammar and vocabulary knowledge as often as you like. Click this link to go there directly. Good luck!