补全对话。从方框中选出适当的句子补全对话。
A: May I help you?
B: Yes, please. I’d like to borrow a book.
A: ____ 
B: Jane Eyre.
A: Wait a minute.____ Sorry, it has been borrowed.
B: ____ . What about Romeo and Juliet?
A: Yes.____ .
B: Thank you.____ 
A: Two weeks. You must finish reading it and return it on time.
B: I see. Thank you. Goodbye.
A: Goodbye.

①哲学是各门具体科学的汇总   

②哲学是包罗万象的科学之科学

③哲学以各门具体科学为基础   

④哲学对具体科学有指导作用

— Please say something about Zheng He.

— Oh! He is the Ming dynasty explorer of ______ all the Chinese are proud.

①若两表串联接入电路，两表示数相同，指针偏转角度不同

②若两表串联接入电路，两表示数不同，指针偏转角度相同

③若两表并联接入电路，两表示数不同，指针偏转角度相同

④若两表并联接入电路，两表示数相同，指针偏转角度不同．