—do you study for tests? —I studylistening to tapes.A. How; with B: What; with C: How; byD

— do you study for tests? —I study listening to tapes.
A. How; with B: What; with C: How; by D. What; by

解析：句意：你如何准备考试？我通过听磁带来学习。这里by表示方式，by doing sth 通过做……，由语境可知，问句应该提问为了如何学习，故用how提问。因此选C。考点: 考查疑问词和介词的用法。

谢谢回答！！！