Mark the letter A, B, C, or D on your answer sheet to indicate the undelined part that needs correction in each of the following questions:

New sources of energy (A) have been looking (B) for as the number (C) of fossil fuels continues (D) to decrease.

 

Suy nghĩ và trả lời câu hỏi trước khi xem đáp án

ATNETWORK
ADMICRO
YOMEDIA
ZUNIA9