读图回答

根据对话内容，从下面方框中选择适当的单词或短语填空，使对话内容完整正确。

A: Hello, nice to see you again.
B: Me too.
A: How is your holiday?
B: Great! I had a ____  holiday. I traveled to Japan with my parents.
A: Really? What did you see there?
B: I saw a lot of ____  ,such as Mount Fuji and Sanrio Puroland. Mount Fuji is so wonderful    that all of us want to climb up to the top. And Sanrio Puroland is the Hello Kitty’s land. We also  visited the Hello Kitty’s house. How lovely it is!
A: You must have a great time.
B:____  . How about you? What were you doing  ____  ?
A: I didn’t ____  . But I had a good time staying at home .I read a lot of books.
B: Oh, that’s interesting . It’s time to have lunch. I have to go. Bye.
A: Bye.

某实验小组用两个相同的小灯泡连接了如图所示的串联电路，当开关闭合后发现，甲乙两灯都不亮，为了找到故障原因．小张用一根导线线来检查．当导线与AB两点连接时，甲灯不亮乙灯亮；当导线与BC两点连接时，两灯都不亮．由此推测故障是（  ）