Mark the letter A, B, C or D on your answer sheet...

Câu hỏi: Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction

A. the best

B. to read

C. are

D. for

A. pollute

B. are

C. factors

D. threaten

A. which

B. in

C. was

D. happy

A. In 2030

B. we will provide

C. needs

D. over 8 billion