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.

Điền vào ô 37

A. whose

B. that

C. with

D. as

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.

Điền vào ô 36

A. Additionally

B. However

C. While

D. Though

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.

Điền vào ô 33

A. bring

B. lead

C. cause

D. produce

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.

Điền vào ô 35

A. on

B. by

C. through

D. about

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.

Điền vào ô 34

A. risky

B. unhealthy

C. secure

D. safe

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 39 to 43.

Mobile phones emit microwave radio emissions. Investigators are questioning whether exposure to these radio waves might (39) ________ to brain cancer. So far, the figures are not final. The precise evidence does not enable us to say in certain that mobile phones are definitely safe. On the other hand, recent research has not yet (40) ________ clear adverse effect associated with the prolonged use of mobile phones.

Many studies are now going (41) _________ in numerous countries. Some of the results are contradictory but the others have shown an association between mobile phone use and cancer. However, these studies are preliminary and the issue need further, long – term investigation.

(42) _________ the scientific data is more definite, it is advisable for people to try not to use mobile phone for long periods 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 hazardous. It is also thought that young people (43) _________ bodies are still growing may be at particular risk.

Điền vào ô 43

A. as 

B. that 

C. with 

D. whose 

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 39 to 43.

Mobile phones emit microwave radio emissions. Investigators are questioning whether exposure to these radio waves might (39) ________ to brain cancer. So far, the figures are not final. The precise evidence does not enable us to say in certain that mobile phones are definitely safe. On the other hand, recent research has not yet (40) ________ clear adverse effect associated with the prolonged use of mobile phones.

Many studies are now going (41) _________ in numerous countries. Some of the results are contradictory but the others have shown an association between mobile phone use and cancer. However, these studies are preliminary and the issue need further, long – term investigation.

(42) _________ the scientific data is more definite, it is advisable for people to try not to use mobile phone for long periods 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 hazardous. It is also thought that young people (43) _________ bodies are still growing may be at particular risk. 

Điền vào ô 42

A. Until 

B. When 

C. Provide 

D. As 

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 39 to 43.

Mobile phones emit microwave radio emissions. Investigators are questioning whether exposure to these radio waves might (39) ________ to brain cancer. So far, the figures are not final. The precise evidence does not enable us to say in certain that mobile phones are definitely safe. On the other hand, recent research has not yet (40) ________ clear adverse effect associated with the prolonged use of mobile phones.

Many studies are now going (41) _________ in numerous countries. Some of the results are contradictory but the others have shown an association between mobile phone use and cancer. However, these studies are preliminary and the issue need further, long – term investigation.

(42) _________ the scientific data is more definite, it is advisable for people to try not to use mobile phone for long periods 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 hazardous. It is also thought that young people (43) _________ bodies are still growing may be at particular risk. 

Điền vào ô 40

A. created 

B. proved 

C. demonstrated 

D. caused 

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 39 to 43.

Mobile phones emit microwave radio emissions. Investigators are questioning whether exposure to these radio waves might (39) ________ to brain cancer. So far, the figures are not final. The precise evidence does not enable us to say in certain that mobile phones are definitely safe. On the other hand, recent research has not yet (40) ________ clear adverse effect associated with the prolonged use of mobile phones.

Many studies are now going (41) _________ in numerous countries. Some of the results are contradictory but the others have shown an association between mobile phone use and cancer. However, these studies are preliminary and the issue need further, long – term investigation.

(42) _________ the scientific data is more definite, it is advisable for people to try not to use mobile phone for long periods 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 hazardous. It is also thought that young people (43) _________ bodies are still growing may be at particular risk.

Điền vào ô 39

A. lead 

B. cause 

C. produce 

D. bring