As soon as he waved his hand, she turned away.
(Trans: Ngay sau khi anh ấy vẫy tay thì cô ấy quay đi)
A. He saw her turn away and he waved his hand.
(Trans: Anh ấy thấy cô ấy quay đi và anh ấy vẫy tay)
B. No sooner had he waved his hand than she turned away.
(Trans: Sau khi anh vẫy tay xong, cô quay đi.)
C. She turned away because he waved his hand too early.
(Trans: Cô quay đi vì anh vẫy tay quá sớm.)
D. Although she turned away, he waved his hand.
(Trans: Mặc dù cô quay đi, anh vẫn vẫy tay.)
*As soon as...=No sooner...than : ngay khi, vừa mới thì đã...
Sau khi xét nghĩa và cấu trúc, ta chọn B.