单选题 By the time you haste completed the essential training, you ______ exposed to virtually every new feature of the course.
A. will have been B. will be C. would have been D. would be

【正确答案】 A
【答案解析】当你完成了基础训练，你几乎会对这门课程的每一方面都会有一个全新的认识。本题考查将来完成时的用法。