thudtt-video quizOnline version thudtt-video quiz by Phuong Nguyen Thi Bich 1 cau hoi 2 a cau tra loi dung b cau tra loi sai c khong tra loi d tra loi 2 cau hoi 2 a cau traoi dung b cau tra loi sai 3 cau hoi 3 a cau tra loi dung b cau tra loi sai 4 cau hoi 4 a cau tra loi dung b cau tra loi sai