* Thiếu đề bài ( nên em nghĩ là tìm từ đồng nghĩa, dựa vào mấy cái đáp án )
Question 15: Many peasants find it difficult to make ends meet.
A. get plenty of food
B. better their life
C. earn enough money for living
D. apply new farming methods
Question 16: Today’s scientists have overcome many challenges of the depth by using modern devices.
A. traditional B. long established
C. old fashioned D. new