(Viên chức Mầm non) 30 đề ôn thi tiếng Anh có đáp án - Phần 30

When he was fifteen he began to work as a mechanic and in 1893 he built his first car. After he ( 21) ________

21/30

When he was fifteen he began to work as a mechanic and in 1893 he built his first car. After he ( 21) ________

is

was

had

Has

Giải thích

Chọn đáp án C