— How can I prepare for class, Mr. Johnson?　　　　— you my web page? You can download the n

— How can I prepare for class, Mr. Johnson?
　　　　— you my web page? You can download the notes and read them ahead of time.
A. Did; check out
B. Have; checked out
C. Are; checking out
D. Will; check out

A. Did; check out(答案→)B. Have; checked outC. Are; checking outD. Will; check out解析：考查时态。“约翰逊老师，我该怎样做好上课准备？”“你已经浏览过我的网页了吗？你可以下载笔记，提前看一下。”check out“检验，核实”。对话情景是现在，check out这一动作发生在过去，对现在造成的影响是老师的疑问，故用现在完成时。故选B。

好好学习下