... hợp Ví dụ: I was reading a book while my mother was cooking dinner B Exercises: I Write sentences with the cue words, using the past progressive tense They/ play/ tennis/ 10.30 yesterday morning ... ……………………………………………………………………………… II Put the verbs into correct form: past progressive or past simple The doorbell (ring) while Tom (watch) _ television How fast _ you _ (drive) when the accident (happen) ... (sit) in the garden It (be) cold when we (leave) the house that day, and a light snow (fall) _ When I last (see) them, they (try) to find a new house near their work I...