Complete the sentences with the correct forms of the verbs in parentheses.
( Hoàn thành các câu với dạng đúng của động từ trong ngoặc)
1.I (jog) in the park when I suddenly – _ (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.
