(Viên chức Mầm non) 5000+ câu trắc nghiệm Ngoại ngữ có đáp án - Test 2

On July 20, 1969, astronaut Neil Armstrong ____________ down onto the moon.

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On July 20, 1969, astronaut Neil Armstrong ____________ down onto the moon.

was stepping

stepped

has stepped

was stepped

Giải thích

Đáp án đúng là b.