Before went abroad, he had finished his English course at the Englishspeaking Center.7/30Before went abroad, he had finished his English course at the Englishspeaking Center.wentabroadhad finishedEnglish-speakingGiải thíchChọn đáp án Awent => goingGiải thích: before + Ving: trước khi làm gì