Giúp mình 3 CÂU TRẮC NGHIỆM ĐƠN GIẢN Ạ. MÌNH ĐẢM BẢO VOTE 5 SAO, CẢM ƠN VÀ CTLHN Ạ 1. What subjects are you good... in the 9th form? (at, in, about, on) 2. Hai decided to all her work at the end of every week. ( study, do, tell, revise )" 3. What subjects are you good... in the 9th form? (at, in, about, on)