Lesson C
3. C. Complete the sentences with the correct forms of the verbs in parentheses.
(Hoàn thành các câu với dạng đúng của các động từ trong ngoặc.)
1. I _____ (jog) in the park when I suddenly _____ (fall) and _____ (hurt) my knee.
2. While the students _____ (perform) on the stage, their parents _____ (arrive) at the hall.
3. My teacher _____ (wear) a beautiful white áo dài when I _____ (see) her at the graduation ceremony.
4. We _____ (prepare) a poster for the school event when the teacher _____ (come) to help us.
5. Alice _____ (do) exercises while her classmates _____ (discuss) the presentation topics with each other.
was jogging
fell
hurt
were performing
arrived
was wearing
saw
were preparing
came
was doing
were discussing