问题补充：
Hardly his speech the audience started cheering.
A. did he finish; than
B. does he finish; before
C. has he finished; while
D. had he finished; when
答案：
A. did he finish; than
B. does he finish; before
C. has he finished; while
(答案→)D. had he finished; when
解析：句意：他还没演讲完观众就开始欢呼雀跃了。hardly.......when.......是固定词组，意思是“还没……就……， 还没来得及……就……”hardly 是副词，放句首位，要倒装， 而且要用过去完成时，选D。
