Mukai Chiaki, the first female Japanese astronaut, ……….. 15 days aboard
13/15
Mukai Chiaki, the first female Japanese astronaut, ……….. 15 days aboard the space shuttle Columbia in space before it …….. to the Earth on July 23,1994.
spent - had returned
had spent - returned
was spending - was returning
spent - was returning
Giải thích
Đáp án: B
Giải thích: Hành động xảy ra trước một hành động trong quá khứ