`27`. A in 1881

- Dẫn chứng: Dòng đầu tiên - AlexanderFleming was born in 1881 in Scotland.

`28`. C in an office 

- Dẫn chứng: .... when he left school he didn't go to university. He worked for five years in an office.

`29`. A 1 

- Dẫn chứng: They had one son.

`30`. C in 1982

- Dẫn chứng: He worked for many years and in 1982 he discovered a new drug and he called it "penicillin"

$\text{Trả lời}$

$\text{27.Chọn A.in 1881}$

$⇒$ Dựa vào câu : Alexander Fleming was born in 1881 in Scotland.

$\text{28.Chọn C.in the office}$

$⇒$ Dựa vào câu :  He worked for five years in an office.

$\text{29.Chọn A.1}$

$⇒$ Dựa vào câu : He had one son.

$\text{30.Chọn C.in1928}$

$⇒$ Dựa vào câu : He worked for many years and in 1982 he discovered a new drug and he called it "penicillin"

$\text{#Pandola}$