Chỉ có 6 câu nha Chia động từ thích hợp: 1.He...(wear) a face mask last night so as...(not recognise) by the crowd. 2.What she says...(make) me happy. 3.When we...(see) them last night, they...(sing); they...(say) they...(sing) since six o'clock. 4.I...(ask) another passenger, an Englishman, about the fog and he...(say) that there...(not be) any since previous February. 5. I...(arrive) in England in the middle of July. I...(tell) that England...(be) shrouded in fog all year round, so I...(be) surprised to find that it was merely raining. 6. John and I went for a walk. I...(have) trouble...(keep) up with him because he...(walk) so fast.