Hesitating what to do, .
A. so let’s not go outing
B. we had to stay home
C. the tour was cancelled
D. but we should still take the tour
网友回答
A. so let’s not go outing
(答案→)B. we had to stay home
C. the tour was cancelled
D. but we should still take the tour
解析：考查句子结构，第一句是分词做状语，后面只能是简单句，而且分词的主语和后面的主语应该一致，这里是we做hesitate的主语，选B，句意是：不知该做什么，我们只好呆在外面。