Câu hỏi: Oxygen plays a important role in maintaining live.

A. a

B. plays

C. role

D. live

Câu 1: He passed the exams with high scores, that made his parents happy.

A. passed

B. with

C. that 

D. happy

Câu 2: Many young people lack skills, good education, and financial to settle in the urban areas where many jobs are found.

A. lack

B. financial

C. urban areas

D. are found

Câu 3: There are many reasons why a particular species may become endangering.

A. endangering

B. may

C. a

D. reasons why

Câu 4: It is important that you turned off the heater every morning before you leave for class.

A. turned off

B. before

C. important

D. leave for

Câu 5: A child of noble birth, his name was famous among the children in that school.

A. of

B. his name

C. among

D. in that

Câu 6: She did not know where most of the people in the conference was from.

A. did not

B. where

C. the

D. was