Bộ 10 đề ôn thi học sinh giỏi Tiếng anh lớp 9 năm 2023 có đáp án (Đề 6)

________ the age of 21, he was able to gamble in Las Vegas. A. When reached B. Upon reaching C. Reached D. As reaching

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________the age of 21, he was able to gamble in LasVegas.

When reached

Upon reaching

Reached

As reaching

Giải thích

Chọn B