问题补充：
Hardly to speak when the audience interrupted him.
A. he began
B. he had begun
C. had he begun
D. did he begin
答案：
A. he began
B. he had begun
(答案→)C. had he begun
D. did he begin
解析：考查部分倒装句：Hardly+过去完成时的倒装+when…，“一…就…”，hardly是否定词，放在句首，后面用部分倒装，助动词had放在主语前面。句意：他一开始说话，观众就打断了他。选C。
