单选题 To such an extent ______ his empty speech that some of us began to doze.
A. did he go on with B. he would go on with
C. he went on with D. he did go on with

【正确答案】 A

【答案解析】[解析] 为了强调表语、状语可将其放在句首，此时句子要用倒装。