He kept to send messages while he was driving, which was very dangerous.
Giải thích
B
keep + V-ing: tiếp tục làm một hành động
Sửa: to send → sending
Câu đúng: He kept sending messages while he was driving, which was very dangerous.
Dịch: Anh ta liên tục nhắn tin khi đang lái xe, điều này rất nguy hiểm.