--Laura didn’t join in their dancing last night did she ?--- because she fell off her b

问题补充：

--Laura didn’t join in their dancing last night , did she ?

---, because she fell off her bike and hurt her legs

A. Yes, she did

B. No, she didn’t

C. Yes, she didn’t .

D. No, she did

答案：

A. Yes, she did

(答案→)B. No, she didn’t

C. Yes, she didn’t .

D. No, she did

解析：B 反意疑问句的回答根据事实，肯定用yes，否定用no。根据句意，她从自行车上摔下来伤到腿了。可知，她没去。排除A/C, D项前后矛盾。故选B。