`1`. The first boy who knows the truth has just moved.

`2`. The only thing which makes me worried is how to go home.

`3`. He was Tom whom I met at the bar yesterday.

`4`. They are looking for the man and his dog that have lost the way in the forest.

`5`. My wife, whom you were speaking to, wants you to come.

`6`. The students whose reports are very valuable will be awarded the present.

`7`. The botanist will never forget the day when he found a strange plant.

`8`. The man whose daughter is fond of dancing works for my father's company.

`9`. Carta has a sister whose name is Juma.

`10`. Huyen likes the blue T-shirt which my sister is wearing.

`11`. The children were attracted by the show which was performed so many.

`12`. Tet is a festival which often happens in late January or early February.

`13`. That is a company which produces ring.

`14`. Linda bought a new phone yesterday which I can use to send and receive message.

`15`. The most beautiful girl whose long hair I like very much live in the city.

`16`. The children often go swimming on Sundays when they have much free time.

`17`. The tree which stands near the gate of my house has lovely flowers.

`18`. The last man whom I want to talk to at once has just returned from the farm.

`19`. The book which I was reading yesterday was a lovely story.

`20`. Someone who looked for you three hours ago is phoning you.

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`@` Đại từ quan hệ:

`-` Who thay thế cho danh từ chỉ người ~ có chức năng làm chủ ngữ hoặc tân ngữ trong câu.

`+` N(người) + who + V

`-` Whom thay thế cho tân ngữ chỉ người ~ có chức năng bổ nghĩa cho động từ trong mệnh đề quan hệ

`+` N(người) + whom + S + V

`-` Whose thay thế cho tính từ sở hữu ~ có chức năng làm chủ ngữ hoặc tân ngữ động từ trong câu.

`+` N(người/vật) + whose + N + V

`-` Which thay thế cho danh từ chỉ vật ~ có chức năng làm chủ ngữ hoặc tân ngữ trong câu.

`+` N(vật) + which + S + V ~ hoặc N(vật) + which + V

`-` When thay thế cho các trạng từ chỉ thời gian

`+` N(time) + when + S + V