Exercise `3` `:`
`1.` failed`/`had skipped
`2.`had worked `/` published
`3.` passed `/` had studied
`4.` bought `/` had saved
`5.` had worked `/` took
`6.` had played `/` switched
`7.` had sold `/` opened
`8.` had expected`/` arrived
`9.` was`/` had fought
`10.` was`/` had waited
Exercise `4` `:`
`1.` felt `/` had eaten
`2.` had bought `/` cooked
`3.` had run `/` got
`4.` noticed `/` had smoked
`5.` said `/` had worked
`6.` had dated `/` met
Chúc bạn học tốt!!
@Katniss
