It was in 1875 ..... joined the staff of the astro...

Câu hỏi: It was in 1875 ..... joined the staff of the astronomical observatory at Harvard University.

A that Anna Winlock 

B Anna Winlock, who

C as Anna Winlock   

D Anna Winlock then

Câu hỏi trên thuộc đề trắc nghiệm

- Unit 13. tiếng Anh 11 Có lời giải chi tiết