Câu 31 (VDC): Transportation has been made much easier thanks to the invention of cars. However, cars are the greatest contributor to air pollution.
     A. Although the invention of cars has made transportation much easier, cars are the greatest contributor to air pollution.
     B. However easier the invention of cars has made transportation, it is cars that are among the greatest contributors to air pollution.
     C. The invention of cars has made transportation much easier, but cars are among the greatest contributors to air pollution.
     D. Although the invention of cars has made transportation much easier, people use cars to contribute to the pollution of air.
Câu 32 (VDC): All the homes of the residents had been damaged by the flood. They were given help by the Red Cross.
     A. The residents, all of whose homes had been damaged by the flood, were given help by the Red Cross.
     B. The residents, all of their homes had been damaged by the flood, were given help by the Red Cross.
     C. The residents, all their homes had been damaged by the flood, were given help by the Red Cross.
     D. The residents, all whose homes had been damaged by the flood, were given help by the Red Cross.
25. Đề thi thử THPTQG 2021 - Tiếng Anh - Chuyên Nguyễn Trãi - Hải Dương - L1 - có lời giải