Câu hỏi: Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrases that best fits each of the numbered blanks.
Mobile phones emit microwave radio emissions. Researchers are questioning whether exposure to these radio waves might (33) _ to brain cancer. So far, the data are not conclusive. The scientific evidence does not enable us to say with certainly that mobile phones are categorically (34) _________. On the other hand, current research has not yet proved clear adverse effects associated with the prolonged use of mobile phones.
Numerous studies are now going (35)_________ in various countries. Some of the results are contradictory but others have shown an association between moblie phone use and cancer. (36) _________ , these studies are preliminary and the issue needs further, long-term investigation.
Until the scientific data are more definite, it is prudent for people to try not to use mobile phones for long period of time. Don't think that hands-free phones are any safer either. At the moment, research is in fact showing the opposite and they may be just as dangerous. It is also thought that young people (37) _________ bodies are still growing may be at particular risk.
The word or phrase which best fits the gap (35) is...
A. on
B. by
C. through
D. about
Mobile phones emit microwave radio emissions. Researchers are questioning whether exposure to these radio waves might (33) _ to brain cancer. So far, the data are not conclusive. The scientific evidence does not enable us to say with certainly that mobile phones are categorically (34) _________. On the other hand, current research has not yet proved clear adverse effects associated with the prolonged use of mobile phones.
Numerous studies are now going (35)_________ in various countries. Some of the results are contradictory but others have shown an association between moblie phone use and cancer. (36) _________ , these studies are preliminary and the issue needs further, long-term investigation.
Until the scientific data are more definite, it is prudent for people to try not to use mobile phones for long period of time. Don't think that hands-free phones are any safer either. At the moment, research is in fact showing the opposite and they may be just as dangerous. It is also thought that young people (37) _________ bodies are still growing may be at particular risk.
The word or phrase which best fits the gap (35) is...
A. on
B. by
C. through
D. about
Chọn on vì "Numerous studies are now going______in various countries": Rất nhiều nghiên cứu vẫn đang diễn ra ở nhiều nước khác nhau.
Các đáp án khác sai nghĩa và không hợp ngữ pháp:
go by: trôi qua
go through: vượt qua, đi qua
go about: khởi công, bắt tay vào
Các đáp án khác sai nghĩa và không hợp ngữ pháp:
go by: trôi qua
go through: vượt qua, đi qua
go about: khởi công, bắt tay vào
Đáp án A.