`@kem`
Bài 1:
`1.`studied
`2.`have knew
`4.`am sleeping
`5.`Have learned/have learned
`6.`bought
`7.`sleep
`8.`have lived
Bài 2:
`1.⇒` I have cooked for dinner for 2 hours
`2.⇒` I have expected to have a message
`3.⇒` Dan has grown a beard
`4.⇒` The temperature has been decreased from 22 to 15.
`5.⇒` I have improved my English
`6.⇒` Kim hasn't found her key yet.