17000 bài tập tách từ đề thi thử môn Tiếng Anh có đáp án (Phần 3)

Not until a monkey is several years old to exhibit signs of independence from its mother.

378/1620

Not until a monkey is several years old _________ to exhibit signs of independencefrom its mother.

beginning

does it begin

and begin

it begins

Giải thích

Chọn B