In recent months, the final mapping of the human genome ________ the range of medical treatments and cures available to those suffering from various diseases.
A. has extended
B. extends
C. will extend
D. will have extended
Answer:A
In recent months, the final mapping of the human genome ________ the range of medical treatments and cures available to those suffering from various diseases.
A. has extended B. extends C. will extend D. will have extended