`29.B`

`-` Dẫn chứng dòng đầu: Serena Williams is an American professional tennis player...

`30.D`

`-` Dẫn chứng: Serena Williams is an American proffessional tennis player

`to` Serena Williams là một vận động viên quần vợt chuyên nghiệp người Mỹ.

`31.A`

`-` Dẫn chứng dòng `1` đoạn `2`: She turned professional when she was just `14` years old

`to` Cô ấy trở nên chuyên nghiệp khi cô ấy chỉ mới `14` tuổi.

`-` `1981+14=1995`

`32.C`

`-` Dẫn chứng dòng `1,2` đoạn `2`: So far, she has had `4` Olympic gold medals.

`to` Cho đến nay, cô đã có `4` huy chương vàng Olympic.

29 B.

- D/c: Serena Williams is an American professional tennis player.

30 D

- D/c: She is known as one of the most greatest famale tennis players of all time.

31 A

- D/c: She turned professional when she was just 14 years old.

- 1981 + 14 = 1995.

32 C

- D/c: So far, she has had 4 Olympic gold medals and 23 Grand Slam singles titles.