500 Câu trắc nghiệm ngữ pháp Tiếng Anh có đáp án - Phần 19

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

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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

Chọn đáp án B

QKHT before QKĐ