Exercise : Chia động từ trong ngoặc ở đúng thời 1/ When I (arrive) ....................at his house, he still (sleep)................. . 2/ The light (go) ........................out while we (have)................................ dinner. 3/ The last time I (see).................... him, he (wear)................... a grey suit. 4/ Just as I (leave)........................ , a student (stop).....................me in the hall 5/ Nam (play) ................football when he (break)................. his leg. 6/ We (drink) ....................a lot of beer at the party the day before yesterday. 7/ They (build) ................a new bridge when I was there 2 months ago. 8/ He (sit).......................... in a cafe when I saw him. 9/ My company (make).................... a lot of profits 5 years ago. 10/ What you (do) ........................when I phoned you on Monday ? 11/ While the two thieves (argue).............., someone (steal)........................ their car. 12/ When he was a boy at school, Edison (ask) .......................a lot of questions. The teacher (think) ....................he was stupid and she (send) .................him home. Edison's mother (teach) ..............her son at home and he (begin) to carry out a lot of experiments. 13/ - You (visit).................. the zoo yesterday ? - Yes, I did. When I (go)........................ there, I (see)........................ our teacher. 14/ Who (invent).............................. the radio ? Giúp mik với mn