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

A. a

B. plays

C. role

D. live

Câu 1: 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 2: Most of the houses on the street was built in the previous century.

A. of

B. on

C. previous

D. was

Câu 3: Mr. Smith, along with her cousins from Canada, are planning to attend the firework display in Da Nang, Vietnam.

A. with

B. her cousins

C. are

D. to attend

Câu 4: The Oxford English Dictionary is well known for including many different meanings of words and to give real examples.

A. well known

B. The 

C. meanings 

D. to give

Câu 5: 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 6: There are many reasons why a particular species may become endangering.

A. endangering

B. may

C. a

D. reasons why