`=>`
`1` . She is excited about going to Da Lat this time.
( excited + about : hào hứng về cái gì )
`2` . That actor who I have forgotten his name is very well-known.
( Who là đại từ quan hệ thay thế cho "that actor" )
`3` . Viet Nam is the country which grows the most rice.
( Which là đại từ thay thế cho "Viet Nam")