Neil Armstrong was the first astronaut to step on...............moon in 1969

Câu hỏi :

Neil Armstrong was the first astronaut to step on...............moon in 1969.

A. the

B. x

C. a

D. an

* Đáp án

A

* Hướng dẫn giải

the + vật duy nhất: sun, moon, earth...

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